no sound

Greetings, I recently bought a Mavic Air 2 and could finally get it in the air 2 days ago, but while i was pretty satisfied with its flight performances, when i checked the footage i shot once back home, i noticed that all videos were without sound and failed (frozen image, then slowmotion but...

I've been fiddling with recording more video (I'm a photographer, mainly), and I see where you can enable Cache During Video Shooting as well as Record Audio with Video Cache. So when I go back to play the video on the phone (DJI Go)/controller pair, I can hear the audio being recorded by my...