Gnome 3.38 with Xwayland has screen corruption for X11 apps.
@robclark asked me to submit this bug, when running Gnome 3.38 on a Wayland instance, whenerver there is an X11 app, it shows up as corrupted. An example screenshot can be found at https://dev.gentoo.org/~steev/files/screenshots/extra-secure-keepassxc.jpg
When adding FD_MESA_DEBUG="noubwc,notile" to /etc/environment, the corruption goes away.