Hello @abc-mikey, we're tracking issues with games run with Proton in the Proton issue tracker. Additionally, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/5613#issuecomment-1059957029.
Your system information
Please describe your issue in as much detail as possible:
Elden Ring does not exit when stopped. The window disappears but the music keeps playing and Steam thinks it is running. Have to force stop with Steam.
Elden Ring Launch options: PROTON_NO_FSYNC=1 gamemoderun %COMMAND% -windowed
Steps for reproducing this issue: