https://bugs.winehq.org/show_bug.cgi?id=46410
--- Comment #29 from Sveinar Søpler cybermax@dexter.no --- (In reply to Steve Ebey from comment #28)
tested the most recent git of vkd3d and i still have the screen flicker. it has been a month since my last comment, and I wonder if anyone is working on this. I can disable SSAO and flicker stops but text over NPC in game is garbled, and ground texture is constantly flashing. I have removed the fedora distro libvkd3d and the problem still persists.
Currently Wine does not support what is needed for World of Warcraft to start with vkd3d (d3d12). Until that is supported officially, i do not think this particular issue is worked on for that game.
You won't get help HERE with unofficial patches and branches of wine/vkd3d.