"Last Contact" to VRM is over 2h, however everything works fine

Seems like this new remote (it’s really remote, 1h drive from any proper settlement), is giving me numerous trouble.

I am now getting a 2h20m “last contact” count and rising, while the installation is clearly online, never mind I’ve also rebooted the unit a couple of times.

Does this make any sense?

Above issue is linked to some strange network misconfiguration, that’s mentioned in this thread: Total mess on a remote mountain shelter installation - #4 by thanar

I switched the installation to GUIv1 (the old one) and this issue went away. However, switching to GUIv2 (the new one) brings it back.