Using Wayland on Linux with NVIDA graphics card causes written text to flicker and lag behind

What you are describing sounds like an issue down the stack, electron or more likely wayland or the gpu driver.
You are most likely have to wait until the upstream issues are resolved.

Also, let me remind you that:

For Linux, we only accept bug reports that are reproducible with our Appimage package under Gnome or KDE.

We do not have the manpower to test/support anything else.