[lxgr]

You're equating occasional dropouts (which can happen for all kinds of reasons even in bent-pipe topologies) with the absence of inter-satellite links. That makes no sense.

The empirical way to test for the existence of ISLs would be to go to the middle of an ocean, safely out of reach of any ground station, and see what happens. If you get a connection, that can only be due to ISLs.

It seems like your actual complaints are with network/routing stability, and you're drawing invalid conclusions from there.