Ansys Employee

I do not see GeForce RTX3060 in tested/supported graphics card document for Ansys 2021R2. This could be the reason behind the glitch in GUI. 

Ref - https://www.ansys.com/content/dam/it-solutions/platform-support/previous-releases/ansys-2021-r2-graphical-display-graphics-cards-tested.pdf

You can try updating the graphics card to see if it helps. 

or, try renaming the %appdata%\Ansys folder and relaunching Ansys again to see if that helps (resets config to default)