If after reboot the time is still wrong, then it indicates a problem with NTP sync. In firmware 2.1.9(3) I made a change to NTP in that if the NTP IP is 0.0.0.0 (which is now the factory default value) it uses pool.ntp.org as NTP server, otherwise it uses whatever you specified as NTP server. But I think this shouldn’t matter with OS 3.0 because OS 3.0 already uses pool.ntp.org as default server; the change primarily affects OS 2.3, because its default NTP server previously seems to have stopped working reliably.