Hello @jcfrosty, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/1295#issuecomment-493051807.
proton 4.2-3x1 2019-05proton 4.2-4x1 2019-05
Compatibility Report
System Information
I confirm:
There is a whitelist request for this game. This game used to work perfectly. I've been playing it for over a month now. After recent upgrade to proton 4.2-4, its now flickering and unplayable.
steam-587260.log
Symptoms
Tokyo Xanadu eX+ has been working great for some time now. Proton 4.X has been working with no issues until recently when 4.2-4 was released. Now the game flickers a black screen on and off. Now if you have an extra wide monitor it uses a still image to fill in the gap and the still image doesn't flicker, the HUD of the game doesn't flicker, only the game play portion flickers.
Reproduction
upgrade from proton 4.2-3 to 4.2-4 and the game stops being playable.
https://gist.github.com/jcfrosty/938c89ecb73d38dfe032f2c129d4f978
Showing others have been able to play the game for quite some time now as well:
https://github.com/ValveSoftware/Proton/issues/1295