So I've had a bunch of dash cam footage I haven't looked at in a couple weeks and started sorting through them now (no damage to my car, but I do get curious about what happens around it). I even saw the vid of when a lady rear-ended me (miraculously no damage to my car). I noticed after I went to 2019.4.4 that the side-camera vids are practically all blank. Maybe that's what the OP was referring to. Likely a bug that hopefully is fixed with the current 2019.24.4 I'm on. Will pull some files and take a look.