Steam or Microsoft store version?
Peer to peer data distribution? Validation? Would be interesting to see what the network connections looked like at this exact moment.
What was reading that data?
Edit.
I have been looking at this on a couple of flights today.
I have not experienced major stuttering so far today so I don’t think I have encountered the situation as described above.
I have seen a couple of smaller stutter glitches and the activity visible at the time was assets being loaded. Specifically ground/airport assets. Including airports that were not entirely within visual range and not my destination.