Is anyone having a problem with automatic Bluetooth time-sync sync every six hours to an iPhone running the latest version of iOS? Within the past week, it has missed three synchronizations, two at 0:30 hours but also one at 18:30 hours. In both cases the watch was right next to the phone. I have since deleted the watch from the Casio app and re-added it. Hopefully it will help. Has anyone else seen this problem? It is not a battery problem as the battery level is almost completely full.