Since the 9.0 update, wine-staging has been causing freezes for thousands of fullscreen games based on Unity or Unreal Engine. It doesn't matter if dxvk or wined3d is used.
I noticed that non-staging had this bug before 9.0 too but I only really use wine-staging so I didnt notice until it got into staging as well.
There is also a bug report here https://bugs.winehq.org/show_bug.cgi?id=55336
But its been left hanging. Seems like a pretty high priority issue but 2 updates rolled out with no mention of it.
Anyone can give some insight?