In the past week, my S6 has had the incorrect time on the lock screen twice. When i unlock the phone, the correct time is there. When I go back to the lock screen, the time is wrong by an hour. Last Friday, the time on the lock screen was 1 hour ahead, which caused the alarm I set to go off an hour early. Today, the time on the lock screen was 1 hour behind and my alarm did not go off. Both times, after unlocking the phone, the time was correct on the main screen.
Has anybody else had this problem? Is there a way to fix it? The time self corrected today, but on Friday I had to shut down the phone to correct it. It's interesting that the alarm is based on the lock screen time and not the time shown on the main screen of the phone.