iOS App performance issues after upgrade to iOS26 | Home Assistant | Page 1

round walrus Sep 25, 2025, 7:56 PM

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Good evening everyone!

Last night I upgraded my iPhone 14 to iOS26. Since then I have enormous problems with my Companion App (2025.9.2 (2025.1403)).

Switching between room, just normal navigation, is terribly slow, making the app almost unusable.

My first observations:

Since I have other iOS devices with 18.6.2 that I can use in parallel, I can tell for sure, HA itself is not the problem.

As well I tested on my iOS26 device directly in the browser (Safari and Chrome) and I am facing the same issues. This shows, from my pov, that it's caused my the way my phone consumes the data from HA.

This is happening as well internally (using either the IP or homeassistant.local) as also using NC cloud. I do not have a general connection issue.

I am using

iPhone 14 - iOS26 (failure)
iPhone 11 - 18.6.2 (success)
MacBook Pro M1 (success)

HA running on a ProDesk using Proxmox.

Core 2025.9.4
Supervisor 2025.09.0
OS 16.2
Frontend 20250903.5

Unifi Network Components.

So, all in all a rather strange behavior, huh? I tried deletion and re-installation of course, removed the server and added it again, with IP and with link. But again, since the browser on that iPhone has the same issue, I think this is the wrong place to search. But who knows ...

Anyone facing something similar or having a clue what might be the root cause?

Thank you in advance!
Christian

solid fractal Sep 29, 2025, 1:50 PM

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I have exactly the same problem!
iPhone Air: iOS 26.0
iPad Pro M4: iPadOS 26.0
HomeAssistant Companion: 2025.9.3 (2025.1423)

HA Runs on my Mac mini M1 (Supervised)
Core: 2025.9.4
Supervisor: 2025.09.0
Frontend: 20250903.5

round walrus Sep 29, 2025, 7:04 PM

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Thank God! I started doubting myself…😄

Good to see, that others have that problem as well.
According to the latest app comments, others have at least similar issues.

Do you have the same problem, when using Safari or Chrome on the device?

round walrus Sep 30, 2025, 8:34 AM

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Just did another attempt:

emptied frontend cache
deleted servers
uninstalled app
rebooted iPhone
installed app
added server again (which worked immediately)

Unfortunately the issue persists.

I don’t know, if somone with the right tools and skills kann debug that behavior. It seems obvious to me that it is the clash between iOS26 and HA. The app itself and the browsers (Safari, Chrome) are working on other devices.

solid fractal Sep 30, 2025, 9:25 AM

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Hard to say, since my dashboards are not optimized for browser viewing at all.

Unfortunately, my dashboards runs just as smoothly, if not more smoothly, on my old iPhone XS iOS 18.7.

shut notch Sep 30, 2025, 9:25 AM

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I use IOS26 with iPhone 17 pro max without problem. It's the same with my iPhone16 pro max and my iPhone 15 pro. All are under iOS 26.0.1. I also use Unifi network equipments

round walrus Sep 30, 2025, 10:04 AM

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Just updated to iOS 26.0.1. - no change.

I’d search first of all in my own setup of course. But since I see, that only the iOS 26 device is affected, I doubt that UI architecture, network components or the HA hardware can be the cause.

I will check later in another environment (my mother’s house). I have a HA there as well. This might give another hint.

solid fractal Sep 30, 2025, 11:48 AM

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My dashboard might be on the heavier side since I have 3D floorplans in it. I noticed that when the lights are off, everything works fine. But as soon as I start stressing the dashboard graphically (e.g., turning on all the lights), I end up with a blank dashboard.

I also tested by reducing my dashboard to just a single image – that worked. But when I zoomed into that image so more details had to be rendered, I got a blank dashboard again.

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round walrus Sep 30, 2025, 6:50 PM

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Well, this is definately a great dashboard! 🙂

I also tested a bit. What I found out (maybe it was obvious to others), is that indeed only the actual dashboard is affected. When clicking around in the settings, entities, wherever, all that is quick as ever. It’s just the real menue.

And also here, I have quite some data to load. But on the other hand - I’m speaking of some kb to be loaded. This should not be the issue…

twilit blaze Oct 1, 2025, 4:31 AM

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noticed several people with ios26/safari having issues. Would be an apple thing..

round walrus Oct 1, 2025, 5:57 AM

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Good morning all!
@twilit blaze, I agree. I tested my a** off in the last days. All the typical things one would do, without any improvement. Since HA is working as expected on all other devices here (that are not on iOS26) it is the OS for sure.

The question for me is now: Did the change something that would require an adjustment in HA or is it just a glitch and Apple has to fix it? We’ll see.

For anyone with some free time and sympathy for Apple users … :

https://discussions.apple.com/thread/256138201?login=true&sortBy=rank&answerId=261604894022&page=1

I think this points in a certain direction.

twilit blaze Oct 1, 2025, 6:00 AM

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I tend towards apple, but you could try to clear app cache>stop>start app

round walrus Oct 1, 2025, 6:44 AM

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Been there, done that … 😉 Nevertheless, thanks, I appreciate every advice.

solid fractal Oct 1, 2025, 8:33 AM

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round walrus Well, this is definately a great dashboard! 🙂 I also tested a bit. What I foun...

Thanks! I wanted to show more that I end up with an empty dashboard than to show off with my dashboard.

solid fractal Oct 1, 2025, 2:30 PM

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Unfortunately, my problems are getting worse and worse.

the app opens only fine the first time after connecting to my Home Assistant server.
Steps:
Remove the server in the Companion App.
Add the server again → connection works, dashboard loads normally.
Close the app completely.
Reopen the app.
Instead of loading the dashboard, the app only shows a blank screen. After a few seconds it falls back to the “Reconnect” screen.
Notes:
Safari works fine with the same HA instance.
Server runs HA Core 2025.9.4, Supervisor 2025.09.0, frontend 20250903.5.
Devices tested: iPhone Air / iPad Pro M4, iOS/iPadOS 26.0.1

round walrus Oct 1, 2025, 9:05 PM

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Good evening!
Injust tried again - for me Safari is the same. That appears plausible to me, I always considered the app as a kind of “appified” GUI.

My next steps … sit and wait. Since it came with Apple, I expect fw-update to fix it.

round walrus Oct 3, 2025, 9:57 PM

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Good evening!

Good news, maybe.

As mentioned before, I wanted to test the behavior of HA at my mothers house - and guess what, it worked perfectly fine. The most obvious difference: I did not use any photo yet for the rooms. Considering this and the fact, that the dashboard pages were not NOT showing, just SLOWLY showing itself, I assumed, it must be the pictures.

I made the same mistake, we did 15 years ago when building websites manually and not with nice CMS. Uploading a huge picture and just resizing it for the thumbnail was a stupid idea - and it still is. 😁

So I resized the pictures now to 500px for the lower size (still a huge resolution for the size that I actually need, maybe I will fine-tune that). It resulted in a reasonable file sizes of max 300kb - and this finally fixes the problem for me now.

@solid fractal since you are using a relatively big picture showing the whole floor, that might work for you as wll, I hope.

Regardless my poor handling of the pics, I'd like to emphasize, that this was not a problem over months and only occured when iOS26 haunted my iPhone. So still, I see the root cause there. Maybe the App is not keeping the files in a local cache (what may have prevented a repeated loading of the huge pics every time and slow down of the system). So, if a developer or just someone with a deeper technical could look into it, it would still be interesting to hear from you.

Good night, Guys! Hope this helps others as well.

#iOS App performance issues after upgrade to iOS26