Glitchy and Invisible Fill & Stroke Color Palette Dropdown Menu

I noticed 2-3 updates ago that when I click the fill or stroke dropdowns in the top right tool bar that the dropdown menu is all glitchy. Sometimes only two menu options are visible and the whole menu is out of wack.

I'm attaching 3 screenshots I took all within seconds of eachother. One is normal, one is nearly invisible except for two buttons, and one is missing just a few items. 

The only thing that temporarily resolves it is switching between "Color Mixer", "Gradients", and back to "Swatches". 

I just updated today to 28.7.1, but had this issue with the previous version as well.
Is there anything I'm missing here? Or anything I can try to get rid of this issue?