Linux/Steam Proton / 3.21.0c Hotfix 4

In order to get the lootfilter back you need to put it in the folder that Proton 7 used for game data.

For me it was:

"

~/.local/share/steam/steamapps/compatdata/238960/pfx/drive_c/users/steamuser/Documents/My Games/Path of Exile/

Not sure if the number is Steam's registration for the game or something different for each account, so you may have to look in several folders.

+1, rollback to proton 7 fixed it for me on Arch. Happy to assist with providing logs if that'd help.

Same issue