I high recorded about six videos in a row Christmas morning, everyone in the family opening presents, etc. I've now gone back to review them and not a single one of them has any audio. Complete silence. Every video recorded before that has audio, and a few afterwards as well, so no it isn't case or covered mic or something. Has anyone had this happen before, it has to be some kind of software bug. If you've had it happen, do you know what triggered the bug? I'd hate to have to record a little and play it back every time before starting a long video session, just to be sure audio is recording. I'm sure this is rare, but in my case it's pretty much ruined the Christmas memory record this year.
On the plus side, the video looks excellent!