Ref .
I notice your Oct 2 2018 flight on OLC had that peculiar highly
compressed altitude graph, but without the gps altitude dropouts. Maybe
that's just some unrelated OLC display issue.

Good observation, I didn’t notice that.
The one on 10/4 has the same compressed altitude issue, while the one on 10/3 looks ok, as does the flight on 5/1/19.
I have been posting to OLC from that particular 9070 for about 4 years and haven’t had a problem before now.

MS