https://bugs.winehq.org/show_bug.cgi?id=39180
--- Comment #55 from Shmerl shtetldik@gmail.com --- (In reply to Guillaume Charifi from comment #51)
Mh, sorry, I think I read too fast. It is not directly Mesa-related, because it works fine with nouveau, but indeed probably radeonsi-related. However, keep in mind that by using wine-staging, it can also be a side-effect of other patches in the repository. I'll send a trace so that you can check if there are still artifacts (in which case it would be radeonsi's fault).
I replayed your trace, and I can see distortions in the menu, which looks similar to what I get when I run it in Wine. So I'll reopen Mesa bug then.