http://bugs.winehq.org/show_bug.cgi?id=58552
--- Comment #29 from Stian Low wineryyyyy@gmail.com --- (In reply to Patrick from comment #26)
I have seen that flickering too. It is _very_ visible in this free synth: https://mastrcode-music.de/en/vst-plugins/t-force-zenith/
Reproduced flickering and GUI offset mouse misalignment for all wine-staging patches applied against commit 75b9e1722d1 Release 10.13 without my patch applied.
Will retest wine-staging with my patch applied to confirm it still works.