[Sephiroth]

The stats are nominal. Which makes it all the more difficult to diagnose.

In the event log, wherever a MIMO event occurs, that's a reboot. The B-INIT-RNG event is also a reboot, which will have been initiated from the VM end if the modem has lost contact with the CMTS.

So that looks to me to be in the network somewhere. You might care to call support in office hours and keep trying till you get a UK agent. They can jump on and see what's happening.