Nope experienced this through several gos devices.
GrapheneOS addressed this could be due to my device's hardware issue and could be a reason for warranty claim with the seller. i haven't tried though, as last device with his issue was already out of warranty period by the time i received that suggestion.
but having seen many posts about time issues on gos pixels plus having this happen several times on own devices, I doubt it is specific to my particular device.
i lean to think that a combination of network settings and some usage habits can lead to incorrect time.