POE2 Frame Rate Limits dont work under Proton-Experimental

[addohm]

Compatibility Report

• Name of the game with compatibility issues: Path of Exile 2
• Steam AppID of the game: 2694490

System Information

• GPU: RTX 3090
• Video driver version: nvidia 580.82.09
• Kernel version: 6.16.9-200.nobara.fc42.x86_64
• Link to full system information report as Gist:

steam-2694490.log

• Proton version: Proton-Experimental

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.

Symptoms

The frame rate limit for this game doesnt work under proton-expirimental

Reproduction

Change to proton 10 beta, frame rate limit works
Change to proton experimental, frame rate limit doesn't work

[kisak-valve]

Hello @addohm, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to #8296 (comment).