That is probably a good indication that your GPU is now being utilized to its full extent, where prior to the patch, for most users, the performance bugs had the CPU bogged down so badly that the GPU was basically loafing.
Personally, I just don’t trust automatic GPU fan control. Whenever I run MSFS, I manually set the GPU fan to run at 85 percent of its max speed and leave it there until I exit the game. It is a bit noisy of course, and I suppose I might eventually wear out the fan prematurely, but at least I am assured that cooling airflow will be maximized at all times.