Oh that's bizarre. I wonder if the vulkan graphics pipeline is causing that on your computer. I can tell you something to try if you know how to use the command line.
godot -p --rendering-driver opengl3
godot.windows.editor.x86_64.exe or whatever you have it named on your system.
-p opens the project manager. Run with
-e instead to launch the editor directly.
If that doesn't help at all, then I suggest submitting a bug report to Godot's GitHub issues. That will get one of the devs' attention, and hopefully it can be fixed or they can point you to a good workaround.