Deadlock Detected

Second time in a row when doing a chaos or sanctum trial with a friend that one of us gets this error message ("Deadlock Detected"). At which point the game forceably exits and the player is permanently blocked from rejoining the trial.

I'm not sure what words to use to express my frustration. Functional defects like support gems not working are annoying, but at least those problems don't block playing with friends. The "Deadlock Detected" issue is a straight-up blocker -- cannot progress, time lost.

Steps to reproduce:

* enter a lvl 60 sanctum or a lvl 76 ultimatum
* play for a while
* game will eventually freeze for a player and then a "Deadlock Detected" message appears.
* that player's poe2 client exits
* upon restart/login, player cannot rejoin sanctum/chaos instance

Both of us are playing with nvidia graphics cards (latest driver from Dec 18th). I'm using a 5080 16GB, my friend a 5060 TI 16GB. Both of us are using DirectX 12 on the backend with DLSS upscaling to maintain a minimum 120 FPS. These are all options set using the 'O' menu in-game.

I'd play using Vulkan, but that crashes often when on a Disciple of Varashta using the Kelari skills. Otherwise Vulkan would be my first choice as it's normally very stable.

Happened again in a lvl 75 map (T10).

We had both switched to Vulkan to see if that helped -- it didn't.

Don't know if it's important or not, but we're both playing on PC inside the same house (so we share same external IP).

Cant even get into the game, deadlock error on intro screen after a few seconds.

Honestly this wouldn't be that big a deal if we could simply rejoin the trials (chaos or sekhema) upon logging in after the crash.

Kicked out of another 10-trial chaos run -- this one was a bonus because the party leader was the one who "Deadlocked" and was booted.

The rest of the part is dead at the point because nobody else can pick the modifiers for the next room -- that's locked to the party leader (who was sitting outside in the chaos trial lobby area after logging back in)

Looks to be something that only happens when playing in group -- at least that's my experience so far.

We're getting a deadlock every 15-20 minutes.

I have a problem with multiplayer. When I play solo, I play for a few hours. If I connect with someone, or someone connects with me, I have this problem after a while...

I been reading about this since I get it too.
Few things that I have tried.
Updated nvidia driver version.
Roll back nvidia driver one version.
Switch between Vulkan/Dx12
Window fullscreen / fullscreen.
Delete shaders / my games/path of exile files to re-populate them.

when I play solo I have no issues.
When I play multiplayer have no issues.
When I play multiplier with a person running disciple/minion build I get the error.

I read on another thread that is something related to being off-screen.
I got the other person playing disciple to be on screen all the time one map and I didn't crash. Take it with a grain of salt I only tried one map so this result might be skew.

That's good info -- I'm playing with minions and we've both deadlocked at different times. Both of us are playing Disciple of Varashta builds (with Kelari skills). Even tho I'm the only one with minions (clerics + snipers), we both have Kelari beetles (because boom boom)

I'll pay attention to whether we're off screen or not. I think that might have something to do with it -- or it's the beetles.