Compatibility Report

• Name of the game with compatibility issues: Into the Breach
• Steam AppID of the game: 590380

System Information

• GPU: 980ti
• Driver/LLVM version: 415.27
• Kernel version: 4.18.0-15-generic
• Link to full system information report as Gist: https://gist.github.com/LiamDawe/b9ea7140267cdc643946bb2faa682d3c
• Proton version: 3.16-7

I confirm:

• [x] that I haven't found an existing compatibility report for this game. (there are other reports, but this is with the new proton beta)
• [x] that I have checked whether there are updates for my system available.

Proton log:
steam-590380.log

Symptoms

When going into fullscreen, it will make it into a big window, turn it black and freeze the game forcing me to kill it from system monitor