https://bugs.winehq.org/show_bug.cgi?id=43273
--- Comment #36 from Shmerl shtetldik@gmail.com --- (In reply to darkskyabove from comment #35)
FYI going forward: wine-staging 2.15 results in chunky slowdowns, without fixing render issues, compared to 2.14. That's an investigation for a different bug(s).
Yes, please open another bug.