Idk if it’s fixed, persay, but I’ve finally realized how much me overthinking things was sabotaging my life, so I’m trying to take actions to fix it.

[…] Might be an older issue?

For reference, the source that I cited was a report from last month ^[1]. Also, I personally verified that, in Hollow Knight, controller rumble worked with Proton enabled, and didn’t work with it disabled.

I never had an issue on hollow knight. Both on PC Linux and steamdeck. […]

I’m not sure what the exact replication bounds are for the bug; maybe your configuration simply doesn’t experience the issue? Or perhaps you inadvertently configured Steam to force proton somewhere?