Oh wow, that looks rough. Couple Questions:
What are you graphic settings? I wanna see if I can replicate it with the exact same ones
As this honestly looks like a LOD issue to me, can you please enable Developer Mode, then Debug, then tick "Force enable active LOD" and set it to 0 and see if the issue persists?
Also does the issue persist if you actually taxi to those regions or only if you are in the drone cam?