I have the same issue, and my PC is brand spanking new. i9-13900K, RTX 4090, 128gb ram, 10tb M.2. I definitely shouldn't be having any freezing issues, but it repeatedly ruins my flights. Seems to be happening more often when I try to open the F10 map. My CPU/GPU usage drops to 1-2% until it "might" decide to unfreeze itself.