Hello,
Just for information, I have the same issue with AMD Ryzen 9700X (32go ram / rtx 2080S). CPU go up between 90 & 95°c only when flying constructs. (on the ground or in construct mode I have around 60°). Note that CPU load never exceed 20%. The overhear issue in only when I fly.
I raised a ticket to support. I Hope they will fix that . As I told them, I stop the game while they do not fix theses issues. I prefere a dead game rather than a dead computer.