High Mountain Lag

[solar lava]

Once you defeat the stage boss on stages 4,5,7,8 and the special mobs spawn my (and a couple of my guild mates as well) FPS drops to 0 for the entire event (Jeckal/ Night Walker/ Reboot Kronos) (screenshot N/A)

[bitter pewter]

Issue reproduces for users with an Intel CPU, this happens when Tynos's kin (the blue dots on the minimap) spawn

[steel dome]

Same with AMD (Ryzen); just for reference i'm also a night walker and i notice a lot of lag too in the dungeon when my shadow bats are toggled on

[dense zealot]

happened to me to and my video board is NVidia

And contrary to the annoucement there is no way i can avoid this bcs I cant control when they spawn

unless they explain us how that works if there is a toggle were we can turn the spawn off or else.

[proven igloo]

I only get the lag when the big core is on the field, and not even just when the special mobs are spawned, just lag all around until I clear a stage

[dense zealot]

my screen total freezes during the lag it to me more then 30min to do the dungeon, it took me less then 10 last week

[snow copper]

I'd also like to chime in as someone who gets very intense lag that basically freezes the game specifically when Tynos's kin spawns in.
*Even though my very first High Mountain was totally fine. But this 2nd time through on the next week is completely too laggy and way to difficult to sit through.

[potent raptor]

I had really bad lag without even killing the tynos fragment

I had one attempt in stage 8 where I crashed after around 20mins of being frozen, I think I was only around 20% through the stage at the time

I did manage to clear stage 8 a while ago finally, in around 46 minutes

But it wasn’t really worth my time since it probably took me over 2 hours to clear high mountain this week due to lag (not even from killing the fragments), when it previously was 15-20mins

Intel i7 processor, Nvidia 1060 graphics

[proven igloo]

So this wasn't addressed in the maintenance, rip

[merry girder]

Try turning off all summon before hitting the eggs and see if it help?

[proven igloo]

I don't use summons

[elder gorge]

I am expecting Jade to tell devs to give us free 40 sol erda frag for every week this issue isnt fix, cuz I am not gonna torture myself w this 😭

[potent raptor]

Yeah takes over 2 hours for me to do now, not worth ever since their patch to "fix" this

p bad since it was 16mins first week patch

[proven igloo]

@violet ridge Sorry to bother, but is there any update on this issue?

[violet ridge]

not at the moment I'm afraid but I'll make sure we prioritize this for the next maintenance!

[potent raptor]

Would like to add that I've now tried GeForce Now, and it's just as bad (except this week it's way worse than 2 hours -- it just seems unclearable now)

[quasi dew]

im confuzzled because first time ever doing high mountain this didnt seem to be an issue? (nightwalker)

[high patrol]

Yea first 2 times where fine (illium) now same problem

[proven igloo]

It seems to not affect everyone, affects me to an insane degree, but a couple other players I know it does not affect at all

[potent raptor]

+1

[potent raptor]

Yeah feels like my pc just gets nuked now

[fiery scroll]

it turns into a PowerPoint presentation at these stages.

[potent raptor]

It turns into a powerpoint presentation for me on every non-boss stage
1, 2, 5, 7 are okay
4, 8 are absolutely atrocious with about 4 minutes per frame

I can't even complete stage 8 spending the entire hour

[proven igloo]

When I did 8 last week it took about half an hour it's just

So horrible and for pretty much mandatory content

@fickle wharf Just double checking on this please and thank you and sorry for the ping 😭

It's just frusterating having to fight the lag every week

[fickle wharf]

Hi @proven igloo ~ This should be fixed by this next maintenance

[proven igloo]

Thank you for the response!

Look forward to it

[warped cargo]

When you say "this" next maintenance - you mean the patch on July 17?

[potent raptor]

Praying

[violet briar]

What helped for me for the time being ( as a khali ) disable my chakris .
Its still dropping down frames but alot less then with them on.

So if you char has any seeking projectiles , disable/unsummon them for now.

Hoping its fixed though next maint

[proven igloo]

Do you also turn off Astra or nah?

I'll try it without chakri

[violet briar]

Just turned off chakri

Didnt really try anything else. It wasnt completly gone but atleast better doable

[proven igloo]

Bet, I'll do both and see what happens, it should hopefully be fixed in the next patch so it won't be a problem going forward but

Having to keep it til the end out of frustration sucks

[violet briar]

Yeah agreed.

[proven igloo]

Yup that worked

Pretty much 0 lag

[violet briar]

Good ^.^ glad it helped for now

[brisk flicker]

@silver kernel

[short zephyr]

@silver kernel

[onyx wagon]

hasnt fixed for me :c

[fast bridge]

patch did nothing for me, still as unplayably laggy as before

[onyx wagon]

^

[elder gorge]

yo what is going on, high mountain still laggy. I dont understand, it was running smooth the first week it was released.

[echo saddle]

still lagging the shit out of me

[fair sedge]

Yeah I'm still heavily lagging as well on all non boss stages when during the first few weeks of release it was running smoothly

[warm pawn]

still lagging on my Adele (game is completely frozen whenever the yellow mobs spawn)

[woeful moss]

same still lag

[young dawn]

our team is looking into this!

[potent raptor]

+1 to game running smoothly first week
I managed to get past all the stages this week for the first time in a while because Janus Dusk is goated

still sad about previous weeks since I spent a few hours on them and couldn’t complete

[potent raptor]

Or maybe because most players weren’t on yet…

[dense zealot]

havent passed from this mobs without freezing my game for 2mins since week 2 of the launch of the dungeon. the rest of the computer is functional

the game also slows down when the red birds spawn but not always

[onyx wagon]

can you just quarter the number of damn mobs that spawn until theres a fix for this dogshit? feels terrible being -40 frags and -exp every week

[violet briar]

For now i can recommend to disable any seeking projectiles if you use any. Might help a few classes.
As a khali main its doable without chakri's enabled.

Sucks but atleast i can play instead of watching the screen do nothing for 10-20 seconds

[warped cargo]

I'm a Hero, I have no missiles, and I still lag to a standstill. In stage 8 it's even when none of the "kin" are there.

[violet briar]

Yeah its just a temp "fix "for people with seeking projectiles

[proven igloo]

summons might also affect it

the one where you slash it sticks around for a sec

might also be a factor

[young knoll]

Is it just me or during the first 2 weeks there were no issues with high mountain?

[nocturne briar]

Correct

They fucked something up, but because they have 0 competent programmers in GMS they have to wait for KMS or MSEA to figure out what's wrong

[warped cargo]

MSEA doesn't have programmers either

And Korean devs probably have the "it works on my PC" solution

[thick ore]

I'm a Nightwalker, I've noticed that turning Shadow Bat / Ravenous Bat off gets rid of the lag, but takes longer to clear High Mountain, otherwise it's unplayable with that skill toggled on

[rustic ferry]

Hi, I've been doing some test and it seems any summons that are on (sol janus, erda fountain, bats, etc) when the yellow mobs are caste are the reason of the lag, I would recommend to turn off the summons before casting the yellow mobs and clearing them with the mitra skill. Hope it helps.

[brave shuttle]

some people had issues since day 1, they have made changes a few times and its gotten better/worse over the event. personally i had lag during one gold wave on week 3, other then that 0 lag entire event im sure its pretty hard to track down with so much variance across players

[violet briar]

Still no update on this or potential fix ? its getting abit ridiculous now imo

Its also still not mentioned in their new post where they track the known issues :
https://www.nexon.com/maplestory/news/maintenance/18072/v-252-known-issues-hotfixes

Wonder if they are currently working on it

[young knoll]

bump

[proven igloo]

high mountain lag isn't an important issue : D

mandatory content not worth fixing bugs for

[dense zealot]

yes

it appears so

[smoky needle]

😿

[young knoll]

And we're in September now. Any updates?

[uneven imp]

is this being adressed? week 15 now.. took jade 1 week to fix for the people who had this issue week 1

@young dawn

[dense zealot]

I was able to mitigate the lag by using genesis iframe during the gold bees appearance but its not still lags a little , not freezing anymore at least. Since I cant replay the high montain can somebody confirm this

[violet briar]

Last time i checked i still lagged as khali with my chakri's on and it still froze my pc.
I can check this again later this evening or tomorrow.

[bright crescent]

i still to this day lag my ass off on this already time consuming piece of content with me not being able to clear the swarm when it spawns this takes me a extra min or so every room, is there to this day still no fix ?

[dense zealot]

try testing genesis iframe if you have I think it might help with the swarm

[dense zealot]

my friend did it to and confirmed to me the genesis iframe protects agaisnt high montain lag

[bright crescent]

I am not liberated on any of my chars

[violet briar]

Nope still not able to do shit once the golden bugs spawn

[young dawn]

Hi everyone! I understand how frustrating it is with the current lag issues in High Mountain, and I wanted to let know you that our team is actively investigating the matter. I apologize for the delay in resolving this issue, but please know that it remains a top priority. While I don't have an ideal update at this time, I wanted to keep you informed and will share any updates as soon as I get them!
Thank you for your patience and understanding

[proven igloo]

Potaro the best \o/

[young knoll]

~4 month old issue also top priority yikes

[violet briar]

2 weeks further. any update? I just hate doing high montain on my khali this way... I can legit go down get a some tea and go back up while my screen is frozen.

While removing chakri summons does fix it abit , it increases the time i need to spent in the content because of a bug that shoudnt be there in the first place.😅

Rather just not touching the content at all atm

[young knoll]

No updates, but please know the issue remains top priority. 4 months top priority

[violet briar]

[dense zealot]

just remove the extra mobs while the issue cant be resolved

I want the erda fragments equivalents to the weeks this issue has been happening

[subtle leaf]

bump

[violet briar]

This issue was made on : 21-06-2024 07:16

Can we please fix this by now....

[merry girder]

Just wait till angler company is out. Then we can all skip this mountain

[violet briar]

Still sucks for the people that are not able to run angler company.

[subtle leaf]

Inbefore angler company laggs even more -.-

[violet briar]

i sure hope not atleast there are not that many enemies to make you freeze like high mount

[elder gorge]

They somehow managed to screw high mountain even further by not allowing us to up jump out of form. And it's still laggy. What have they been doing during that 24 hr maintenance

[tame ice]

This game fuckin sucks

absolute trash

literally went from no lag back to full lag this update

I swear to god im this close to not playing this shit anymore

[young knoll]

A few more weeks and this top priority bug will be half a year old. In addition, we cannot up jump now in high mountain.

But players can pay to skip

[subtle leaf]

Top priority issue not getting fixed is crazy

[tight forum]

Still not fixed after months.

[subtle leaf]

Not getting fixed in 2024, that's for sure

[violet briar]

I already gave up . im just waiting for the other epic dungeon at this point ....

[subtle leaf]

Cms dodging bug report like their lives depend on it

[violet briar]

Love how they will fix the jump but still not any notice about the lag. Keep it up nexon👍

[warped cargo]

To be fair, enabling an accidentally-disabled skill is far easier than finding the cause of lag and fixing it.
Not that I'm excusing them for not fixing the lag after all these long months.

[violet briar]

Hm idk that doesnt explain the hayato bug being there for awhile

[dense zealot]

Their priority was never on fixing the bugs but on taking money from us to jump the bugs

they should let us skip that for free while they dont fix it , its the minimal custome service we would find reasonable or maybe at least drop the price to 1k mps while it cant be solve as a discont .

[violet briar]

Im just waiting for angler company at this point

[subtle leaf]

There is no customer service, look at how they ignore tags and ignore bug report

[tight forum]

No way I'm doing this when it's not getting fixed.
@fickle wharf any news about this? It's been over 2 months and there's still no communication with the players about this. Content is pretty much unplayable and avoiding summons is not a solution for long time.

[dense zealot]

it took me 20min in andar 8 to clear it bcs the screen was frozen wtf

[tight forum]

Yea, it takes way longer since it just freezes when summons are either out or used. Very annoying.

And they release another epic dungeon soon. Which may have the same issues and won't get fixed, lol.

[warped cargo]

I lag even with no summons, and freeze when the bee clouds appear. Fortunately I don't dc so I can finish the run, but I'd probably get more exp and frags if I just trained elsewhere for the same amount of time.

[dense zealot]

What I am saying is everyweek this issue gets worst.

[tight forum]

And yet it gets ignored again and again.

[subtle leaf]

3 replies from CMS in a thread from 6 months ago

top priority, still nothing changed

[tight forum]

Its like they gave up on this and dont care. Communication is really bad sadly.

[warped cargo]

"Pay to skip this dungeon or just run the new one".

[tight forum]

Curious if the same lag will be present there, too, lol.

[subtle leaf]

it will be there

[warped cargo]

I haven't looked into it much, but I understand most of it is not mobbing (JQs and such) so it shouldn't lag. But we'll see.

[subtle leaf]

it's nexon, after all

[subtle leaf]

yup and if the worst part is, the cms selectively reply to a few bug reports and ninja nerf the issue at hand even

makes you wonder if you should even report a bug at all, if it ends up getting worse by the hand of the cms

[tight forum]

best to send a ticket I guess, though the chances are just as low unless you get a good GM who knows what theyre doing

At this point I dont even know why we have CMs.

It's really upsettings that a bug like this which makes content unplayable and not enjoyable gets ignored for months. But if something that benefits the players occurts, insta fix.

[subtle leaf]

i've been asking the same question for months now

jade in her last months did more than 3 cms we have rn

[tight forum]

ikr

[subtle leaf]

hell even danny from marketing did more

[warped cargo]

Weirdest part is that these are salaried employees.
Nexon is cheap. Why are they paying three people, even if it's minimum wage, to not get even one competent employee's work done?

Who knows what they're having them do in-office, and how it relates to "community management".

But to be fair, even if a CM posted in this thread every day saying "sorry guys, still no news, but I assure you I'm bugging the team about it", it wouldn't change anything.

[subtle leaf]

the cms will engage with some troll about drinking boba, but wont acknowledge bugs thats the crazy part

or they will acknowledge

and nerf

[warped cargo]

They're allowed to "socialize".
They're not allowed to commit the company to anything. If they acknowledge a bug they're admitting fault and could be fired for it if Nexon decides that "it's not a bug, it's a feature". So best to not say anything remotely related to the game itself.

[subtle leaf]

where is this sentiment coming from

[warped cargo]

Observation of what they do and don't talk about.

[subtle leaf]

sure they are allowed to do stuff outside of their job description

but what if they fulfill their responsibilities first

that's what most players are upset about

they are actively not doing that

selectively choosing their battles (ninja nerfing 7 circulators)

[warped cargo]

Nexon considers their responsibilities to the company, first and foremost. Their responsibilities to the players are apparently limited to announcing maintenances.

And writing patch notes, which are slowly improving.

[subtle leaf]

it's a sad world

[warped cargo]

🤷

That's the communicative and transparent company we deal with. Brick wall.

[subtle leaf]

it's weird, they copy paste everything (except gms exclusives) from kms no?

doesnt kms fix the bugs and save logs of it whatsoever

how is nexon is so many shambles

[tight forum]

we always get the bugs they have too.

No idea why the cant fix them before we get the version knowing theres bugs before

its really just copy paste

so sad

[warped cargo]

We even get back the bugs we fixed, because they can't version management

Like the familiar slot crashes.

[tight forum]

Yup

[subtle leaf]

🤦‍♂️

[warped cargo]

Honestly amazing this level of incompetence and yet the company has been profitable for 30 years.

[subtle leaf]

demented nexon employees

job requirement: have dementia

[subtle leaf]

well yeah thank the whales i guess

[warped cargo]

Anyway, we're totally off topic for this thread.
High Mountain lags and will keep lagging until the content is removed.

Let's go to #ms-chat to keep bashing Nexon in general.

[tight forum]

@warped cargo

Reported this again as well

[warped cargo]

Well done

[dense zealot]

the issue isnt among those and thats the problem I have with them

[warped cargo]

In other words: if it's not in our post, we're not working on it. Don't expect a fix in the foreseeable future.
Just pay to skip the dungeon, thank you.

[young knoll]

It's not going to get fixed. Their "dev team" is probably off for the holidays till January.

[warped cargo]

I have no problem with them having the holidays off. The problem is that this lag has been here for six months already. This thread was created June 21st.

[young knoll]

Yeah well top priority and all that

At least you can pay to skip

Evidently there's no QA team (besides the players) but it seems like the devs themselves barely do any testing either. How do you fix the steadfast boxes bug and immediately break the portals in the same patch?

[warped cargo]

There is a QA team. We even have a Senior QA here in this Discord. However, it seems the entire team has bitten off way more than they can chew. Trying to create their own special Christmas event was not a wise use of manpower.

[young knoll]

Really there's a Senior QA here? So we do have someone signing off and approving PRs like that... rough

[tight forum]

How long are we going to ignore the issues, Nexon?

[violet briar]

untill people move over to the next epic dungeon

[zealous mason]

Hardware reference: Intel CPU and NVIDIA GPU.

None of the short-term solutions I have been offered work as a Dual Blade: turning off Sol Janus, Erda Shower, Mirror Image, Blade Clone, and even muting in-game sounds, disabling audio drivers and even unequipping my Katara secondary.

The only thing I notice is when the entire map starts to get filled with gold bugs (Rage of Blasphemy or Rage of Dread) after breaking the Tynos Fragment my frame rate will drop to 0.

I also get a similar lag issue in Princess No Hieizan Temple 3rd Floor after killing the Brainwashed Spearman Oura Shogun (Invincible) will summon with Oura Shogun's Summoned Eel.

The lag disappears after the gold bugs or eels are killed or despawns.

This did not happen during the first week I ran High Mountain, but ever since the "fixes" on the June 20, 2024 Maintenance that is where the lag issues started for me, and others began to post and report this issue.

[manic dagger]

Intel CPU is a bit vague, but I understand that NVIDIA GPUs are very good

[young knoll]

The issue is on their end. Always has been

[tawny mica]

Can't do Angler Company Dungeon because you have to complete the high mountain pre-quest first.

And I can't complete the high mountain prequest becuase it always lags and crashes the game every time. I tried to lowering the resolution and disabling summons on my lynn character, but the game still lags and then crashes when entering the old command center map. The 2nd map with mobs during the prequest.

-Update after a week or two. I finally been able to complete the High Mountain prequest. The trick that worked for me was to just be aggressive during the 1st frame of loading in and pray that I kill enough mobs to restore my frames into a playable state.

1st room was fine. 300-400 mobs but I could still move around decently and kill them.

2nd room was the main killer. 800-900 mobs I think. No matter what, I could only move for a few seconds before freezing occurs. Waiting through the lag is not a option because the lag causes the game to crash. So I just up jumped and started dash attakc spam asap when I enter the portal. It killed around 400-500 mobs. Thankfully, it gave me enough frames to clear the room.

3rd room was playable like the first. It lags heavily when golden mobs spawn. The lag is not bad if you kill enough before the spawn and then keep attacking.

Finally reached Angler Company. Good luck and hope everyone else manages to finish the prequest.

[dense zealot]

ye i refuse to do this content anymore

[violet briar]

I stopped doing it for a month now.

maybe longer.

[dense zealot]

They kind of shadow banned this post the way I see

[blazing bluff]

high mountain lag is due to congestion of mobs and relation to having turret skills in map at the same time while you go into the golden mobs spawning the frames drop severly the way i counter this is to despawn the turret skills like Flare* or erda fountain before it spawns golden and you will be alright

[warped cargo]

I don't have any turrets or summons. Still drop to 0 fps when that wave spawns. At this rate I'll never get them in my monster collection

[shrewd radish]

I have 2 high end gaming pc and they are fine without having any lag. When I play with geforce now on mac then the lag is intense lol.
So probably too many mobs and you need a good or strong pc

[tight forum]

Its barely related to computer specs but Nexon. The issue is known since first maint. after High Mountain's release and Nexon has done nothing since then eventhough many reports have been send and are probably still being send. They're ignoring it. No communication, nothing.

[warped cargo]

Considering GEForce Now servers are capable of supporting far more intensive games than Maplestory, Majestic Dr's comment just proves High Mountain coding is buggy.

[subtle leaf]

Also lagg only happens when the golden mobs spawn. Majestic is just yearning for validation

[upper pasture]

Mine with 13600KF and 3080Ti stills drop to below 10 fps even 0 when golden mob spawn.
When High Mountain just release. It's no lag until some few update after that this problem happens. 🤔

Now, Angler Company is my salvation.

I think it is about coding.

[wooden pewter]

No input was pressed in-game while recording this video.
It has been sped up x10 for obvious reasons.

And since this is the tutorial quest and this needs to be completed before starting the next Epic dungeon, I'm unable to do any of the Epic dungeons currently in-game.

May I suggest giving the option to skip this dungeon altogether so that players in my situation can at least try The Angler Company?

[young knoll]

With Next update coming up next month, I believe we'll be able to run the 2 dungeons and I'm just wondering if anyone can confirm whether or not this issue has been fixed

There's no way this is still an issue 1 year later, right?

[warped cargo]

They have done nothing for it. Except introduce the "pay to skip" option.

[tight forum]

This is has been reported multiple times. I think I wrote 3 tickets or so as well. Always says to wait for future updates. In other words, I think they gave up on fixing this or just can't.
Quite funny since it worked well before the first maintenance after its release.

[worldly gull]

They 100% have given up on fixing this

this has been reported for a LONG time now and they refuse to properly fix or address it. Just give up on this ever being fixed, just like how they said "paying to swap hyper stats will not cost mesos anymore" and it still costs mesos to swap those too.

[tight forum]

Time to mass report it over and over again then

[warped cargo]

"Just pay to skip."

[worldly gull]

My friend unironically does that

he said that's the solution to high mountain lag

just pay.

[upper pasture]

Maybe change minimum of graphic to direct x 11 or 12 would help. GMS stills use 9!!! (engine from win98, winXP era)
I had friends played other region that client used direct x 11. They try many characters as possible no issue at all.

[royal plinth]

So the reason i never even clared this ever was The 0fps lag, everyone gets too? Thats nexon

[main cargo]

Still experiencing the lag. PC runs Black Ops 6 just fine but apparently drops to 0 when doing High Mountain on mushroom game. At this point just delete high mountain

[worldly gull]

Yeah if you are a summon based class, put your summons away

Your summons will cause extra lag

The game can't handle summons in high mountain, they optimized it so poor in GMS

[young knoll]

That's not the issue. People say it's toggles or summons but again the dungeon was completely fine for the first 2 weeks or so

[worldly gull]

It is summons

I don't lag on my non summon based classes

But I do on my summon based classes

It wasn't always this way but currently yeah summons destroy high mountain

[warped cargo]

Some people (or rather, computers) don't lag at all.
Some only lag in stages 7 and 8 when the bees spawn.
Some only lag if they have their summons going.
Some lag throughout even without summons, but can complete the run if they wait the lag out.
Some lag so hard their client crashes and they can't complete a run (which also blocks them from doing Angler, because you have to finish High Mountain once to be allowed in Angler).

But it's not just a matter of how powerful your computer is. Something else is at play, like maybe specific hardware or software features you have enabled. But we haven't been able to pinpoint them, and Nexon is no help.

[young knoll]

It's been nearly a year since this post was created and 11 months since you left this comment and here we are. Any updates?

[worldly gull]

They aren't going to respond to these issues like most other issues

they just leave us on Read

[nocturne briar]

🙏

[Dev Team Comment]
"We’ve identified the cause of the lag occurring in High Mountain and made improvements.
First, we optimized the art asset of the Golden Bee monster appearing during the last wave of Stage 4, 5 which caused the most lag, and decreased the number of monsters summoned by half. But to make sure there are no changes to the gameplay, the points upon defeating the Golden Bee monster has been increased by 2 times. Additionally, we improved the stuttering issue by preloading the data of monsters that are summoned by a large amount in each wave.
We will continue to strive to provide a pleasant environment for gameplay."

[manic dagger]

does this affect monster collection?

[manic matrix]

F I N A L L Y

[warped cargo]

But the lag in stages 7 and 8 is far worse than stages 4 and 5...

[worldly gull]

ABOUT TIME, let's see til tomorrow though I won't say much til I can actually try it out

[violet briar]

Yeah that xD woudnt be the first time they said its fixed and its not

[young knoll]

We'll see how it runs. Crazy how it took a whole year to reduce mob density to fix this allegedly

[subtle leaf]

The first time it came out it worked fine. Then nexon did nexon things, dont get your hopes up

[nocturne briar]

Not to mention none of the other versions have this issue with the lag

It's always impressive Nexon manages to take working things and fuck them up

[proven igloo]

I still lag in stage 8, but not as bad as i remember, it was still about 5 FPS

[nocturne briar]

Well it's certainly better than it was before, but it's still a problem

A lot of lag compared to entire game freezing until the bees despawn

[worldly gull]

It's most likely the freezing due to the bug that's causing intense FPS drops lately that's going on right now and not so much high mountain

we'll have to wait for them to fix that FPS bug first that's affecting the entire game + high mountain.

[proven igloo]

I have no FPS lag outside of high mountain so I doubt it's related

And also it's ONLY in stage 8 that I had the intense lag

So it's definitely just high mountain