Don't worry, Seth Evans (touring and studio musician for Black Midi) helped produce this song, and Black Midi's drummer (Morgan Simpson) is credited on Greep's new album, which is set to release in a month: https://open.spotify.com/prerelease/6uPLM4h3oBnZ3IKUL4f20H
Cameron Picton is also doing a solo project called CameraPicture or something
Looks like you're not the only one:
https://www.reddit.com/r/linux_gaming/comments/1f5kyd1/psa_using_proton_experimental_or_at_least/
https://www.reddit.com/r/linux_gaming/comments/1ffxfjb/apex_legends_proton_epic_bug_that_do_that/
They've falsely banned linux players before, once in March 2023 and again in August 2023.
I got hit in the Aug 2023 ban, and had my permaban overturned after 1-2 weeks. Expect to have your appeal rejected, we had to make enough of a fuss about it to get a community manager to reach out to the development team to get people unbanned:
https://www.reddit.com/r/apexlegends/comments/15uqt7w/linux_users_getting_falsely_banned_again/
https://answers.ea.com/t5/Technical-Issues/Linux-players-getting-banned/td-p/12338557/page/50
I haven't played in 9-10 months since the false positive put a really bad taste in my mouth, so I don't have any datapoints to add for the current state of things, but I wish you the best of luck getting unbanned.