I have three Graphene OS devices. One of them, a Pixel 9 Pro Fold, recently began to fail to sync the time. This has been an issue for about two weeks. I just spent a couple hours troubleshooting.
I observe that if I manually set the correct time and then reboot, it jumps to exactly 4:25pm. Always the same time. The RTC appears stuck. To save us all time I will point out that the RTC problem is probably not the real problem because if I could sync the time, I wouldn't even know about this.
I have checked connectivity to *grapheneos.org, *ntp.org, and various public DNS servers. I normally have public DNS blocked, but I tested it extensively unblocked.
Do we have any other ideas?