Hi David, I’ve responded to you in email. In my last reply, I said I suspect the issue is the NTC sync server — since OS version 1.2 does not have a built-in RTC, it gets time from NTC server each time. Firmware 1.8.3 hardcodes the NTP server ip does not expose it to the web interface. But we can try re-compile the firmware with a new NTP server IP and it should solve the problem.