In areas where Bing only has high level satellite data, the sim tries to auto generate (I assume) higher level detail. For example here 69° 22’ 21.27" N 115° 23’ 20.48" W, North side of the Dolphin and Union Strait in Northern Canada.
I get that there is no better data available yet maybe there is a better way to handle this. It would be better if the sim simply kept showing the low res sat data at cruising altitude, instead of replacing it square by square with something worse.
Still plenty beauty to be found up here (Inuvialuit Lands)
Except for the blur circle at the bottom.