I discovered a sound sync problem with saved video clips from the memory card.
First video below was the alert. The sound is fine on that. The second is the recording I extracted from the memory card. The sound was fine during the playback from the card, but was out of sync on the saved clip.
I extracted it using a 128 GB iPhone 6 running iOS 10.3.3 and app version 1.3.134.
I’m using a V2 cam with firmware 188.8.131.52.
My memory card is a Kingston Canvas Select 32GB microSDHC Class 10.