Hi all. I’ve got a problem that I don’t even know the name of, so it’s hard to google for a solution. At random intervals (but about 5-10 times per hour) my screen will have just a flash of activity near the bottom - it looks like some process is starting to draw a screen and then rapidly hide/disappear it, so it’s just a flicker/flash. I can’t find any programs open that use a screen in that lower position (bottom 20%, most or all of the width).
I haven’t been able to find any way to induce it, it just seems random. Mostly happens in Safari, but I’m pretty sure I’ve seen it while in other programs too.
Any clues? Computer is functioning well otherwise, but it gets annoying.
Using a 2018 macbook pro 13" running 10.14.6.