There are 3 glitches in the UI. 2 somehow got fixed after reopening unity.
The first one is add component in the inspector can not be closed. Even if you select another game object. If you add a component, though, it will add it to the game object you had selected when you opened add component.
The ones that got fixed after reopening unity:
The second one is that you can not easily remove components that you had to add because of not closing add component menu. The shadow for the drop down when you press a gear icon appears, but no actual drop down. You can only blindly click on delete.
And the last one is that selecting a component/material when clicking that circle icon near the property. Opens a maximized window with only top left part rendered. When it works right, you can still see it for a split second. And it should not open in full screen.