4e3a7dcf breaks Gamescope showing windows properly.
4e3a7dcf causes crashes and / or graphical corruption inside Gamescope [https://github.com/Plagman/gamescope] when it is trying to display windows of any kind. Fullscreen works fine, however.
Reverting that commit resolved any problems I was having.
Distro: Arch Linux
GPU: RX 580
Mesa version: 20.1.0-devel (git-969aeb6a)
libdrm version: 3.36.0
LLVM version: 9.0.1
Linux kernel version: 5.6.3-arch1-1-custom
Examples of corruption: