I once had something like this with my iTraker 0806 Pro, if I'm not wrong it was the memory card.... was years ago.Anyone ever had an experience where there's a stutter in the video but recorded the audio? Yesterday when driving home in the rain, felt like I hit something on the highway and went to review the footage... The moment if the impact, Viofo A139 didn't record that few second, instead, froze in the frame and continued recording afterwards, but the audio was recorded. Maybe my memory card (Samsung Evo Plus 128gb) went bad? Though it's been recording fine...
Trimmed clip: https://drive.google.com/file/d/1Kzodv714_OFpw8-Y8BLTOkNyi1nD5ZEk/view?usp=sharing
I would change the card and watch the whole thing