GPS Sync Problem?

Well, the issue is we still have Ubiquiti 3.65 equipment that we're trying to migrate away from, and those radio's are pretty noisy in our experience so spectrum is a hair tight until we can get that stuff powered down. 

Well, at 3:44 A.M. 5/12/16 I decided to try one last time to reboot this radio with "auto sync" selected and GPS sync is back. Really curious as to what's going on here.