Could you also give this a try: Go to Edit → Editor Preferences → on the Appearance page (the one that opens by default) Change the “Enable Window Animations” box (on and off) . This was posted by DotCam in UE4 Editor Bug - Drop Down Menus Shaking - Feedback for Unreal Engine team - Unreal Engine Forums
My specs: i7 4770K 1080TI 24GB RAM. Nvidia driver version 461.40, Windows 10 Pro 10.0.19041 and UE 4.26.1
I don’t have these issues and maybe one of the differences of our systems is the key
- I am using an “old” driver, GameReady not Studio
- I am not using Raytracing
- I am deactivating SteamVR when I open my projects
- I am working with FullHD
- No other running programs
Sry that I don’t have a solution for you.