My workaround has been to Alt+Enter out of and back into it, but last night I had to do this like twenty times to “kick” it back to behaving normally. I don’t even know that “stutter” is the right word, when I tried to search here for an answer I didn’t see anything that obviously represented my exact problem: https://youtu.be/55LkzkDEV1Y?t=1035
4080, 7800x3d, 32GB DDR5, payware KDTW and PMDG 737 on VATSIM, in this example - a mission that has traditionally worked okay for me in the past. Sub-200 terrain LOD, most things on Ultra.