They have a few workarounds, but none are consistent across users. They vary from toggling real time traffic off then on again (buffer filling up?) to saving flghts when it happens and restarting them. You’d need to read the long thread (and there are others, been going on since April). It’s all long flights though. They are also reporting that their GPU use when it happens is LOW. Yes LOW. so its more like a buffer filling up or something else maxing out. Dunno.
The thread I read though for info is here (a lot of parallels, but many different PC platforms/specs)-