Xperia Z3 :: Video And Sound Out Of Sync

My videos used to be ok. But now I have issues when recording videos with my Z3. Sometimes the video seems to lag during the recording. Not much but you can see it. When I check the recording, I see that the sound and the picture are out of sync. The pictures start first. When the movie is over, you can still hear the sound (slightly less than half a second). I recently set my phone to encrypted mode. I am not sure if this might be causing the issues I have.