both. the telemetry reporting relies on an internet connection, obviously. So disruptions in it lead to failure. There was a difficult to replicate bug which caused the telemetry reporter in rxos to fail if there was internet connection failure - not always, sometimes. I thought I had licked it, but its clear there is still a problem.
I have not been able to replicate it on my receivers, and I have 3 up 24x7. Those, like yours, and the one from NZ, and others, have constantly been on the map. So there is definitely something specific related to @Seasalt network which is causing him to drop out.
In any such case a reboot should fix it, but I am going to take another look at the failure.