Sometimes when I click on a menu or open a new window, or sometimes even click on a website’s menu within a web browser, it doesn’t appear all at once, one or more horizontal bands of it will appear and then within about half a second the whole thing will appear. The bands are random in width. Most of the time only one band and then the whole thing appears.
What could be causing this? I know it’s only a half a second but it’s annoying and it shouldn’t happen on a 2021 OS and graphics …
