Overcooked2 (728880): AVX with a controller hangs the game in the first 20 secs

[pmatos]

What Game
Overcooked 2.
https://steamdb.info/app/728880/

Describe the bug
The game hangs during the fifst 20secs. Sometimes just before you get to the menus, other times while moving around in the menus.

To Reproduce
Steps to reproduce the behavior:

1. Connect a controller (unsure if important but using a bluetooth xbox controller).
2. Ensure AVX is enabled for 32bits (now the default).
3. Use proton-experimental
4. Start the game.

This doesn't happen without proton, doesn't happen if you don't connect a controller and doesn't happen unless avx is enabled.

Expected behavior
To play the game.

System information:

• OS: Ubuntu 25.10
• CPU/SoC: T14s laptop (Snapdragon X Elite)
• RootFS used: 24.04
• FEX version: FEX main branch as of 07.11.2025
• Thunks Enabled: No

Additional context

• Is this an x86 or x86-64 game: [x86/x86-64/Both]
• Does this reproduce on AArch64 with Radeon/Intel/Nvidia: [Yes/No/Untested]
• Is this a Vulkan game: [Yes/No/Unknown]
  • If Yes, What is your Vulkan driver:

Add any other context about the problem here.