Cold and Dark, Stutters Every Few Seconds at KMCO

This happened at Orlando International Airport and for some reason it is much worse than at KJFK. Did anyone have similar issue?

Supposedly aircraft system could eat up a lot of CPU cycles so I tested it in cold & dark but still, the stutters are quite prevalent here. I also wanted to eliminate reasons related to background downloading so I waited a few minutes before shooting this video.

Please note: there were some dropped frames and it seems to be caused by stuttering. Each stutter was like 1-2 seconds long and was associated with a significant drop in GPU usage and it mostly only happened when grounded. The second my tires rolled off the ground, the stutter was almost gone.