I’m getting the same. Only (or worse) in some regions. Whilst recording the issue to report it as a bug I noticed that it does it in exactly the same spots, regardless of altitude, every time.
I was doing laps of the Mach Loop in Wales and it froze in exactly the same pattern and for the same amounts of time (2-4 seconds, with sometimes 3 in a row) on each of 4 laps. Weird!
I suspect then that if you flew over the same place again from the same direction you would also get the exact same freeze happen. Worth a try to see if you can bear the pain of it.