Oh hey man! Hmm that is odd, I can def take a look at this today because ideally the ui should always be clean and responsive. I wonder if something had changed with how the rendering is handled either by the operating system or graphics library. I'll do some poking and put out a small patch for this asap for this :)
By chance are you on windows 11? I actually do think I saw this happen once when I had on my newer laptop so it might be something that needs a little forced refresh now in the tool backend. If so should be a pretty easy fix to get things back in order.
Appreciate the replies and all the info btw!