https://bugs.winehq.org/show_bug.cgi?id=42749
--- Comment #10 from m.g.j.janicki@gmail.com --- Yes, my X server is definitely from prior to that commit. And I think you were spot on about it also being related to the video driver itself, in my case the "intel" driver. I temporarily configured X to use the "modesetting" driver and the problem went away. That's not a solution since it destroys all my other applications; but, at least I know I should look at rebuilding my drivers and xserver with that diff applied.
Thanks very much for expending so much effort into looking into this. I really appreciate it.