Time sync not working?

Time on my Crebo is 1 minute late compared to my phones, computers, GNSS receiver. It supposed to be syncing via VRM. Network connection (starlink) is always on.
Anybody noticed that?

v3.80~5

Phones usually sync to cell network time. Computers to a different server. I’m not surprised or are you also expecting it to use the GNSS receiver

Which PTP server does the Cerbo synchronize with?
Is it sufficient to have a time server on the LAN?
For example, the router, or does an internet connection need to be established?

Pool.ntp.org