"Controlled Response" achievement did not work.

[mental quartz]

I ran R1B1 solo, no bots, using a Hel Revolver and a HCP. The achievement didn't work so I tried with only pistols, the Burst Pistol and HCP, and still did not get the achievement. I'm not... incredibly upset, but I am spending 45-60 min each time and just want it finished lol.

[surreal harbor]

Weird. I literally got it this morning, also BP + HCP. Something prevents the correct triggering.
Are you modded by any chance?

[mental quartz]

Nope, not modded ever.

[surreal harbor]

What tool are you bringing? Which melee?
Try verifying game cache, then shaffling your loadout around randomly before getting back to pistols.

[mental quartz]

Tool was the auto sentry, spear for melee. I'll def try that

... later tonight lol

[mental quartz]

Update: I did as this said and I got the achievement. Thanks!

[grim chasm]

Question: do you have the log from the failed attempt?

[wary knoll]

Could anyone have attempted to join your lobby while doing the achievement? We found a bug where even when the slot is locked, someone trying to join could cause it to see more than 1 player in the lobby and invalidate the achievement. Good news is this'll be fixed for our next patch.

[mental quartz]

I dont, but I verified the game files and ran it again which gave me the achievement.

[mental quartz]

I don't think anyone did? All of my teams knew I was running it solo and I do not remember anyone trying to join throughout the entire run.