Gaps in timeline / playback w/both the old firmware, and the newer beta firmware

No idea what is causing this. Tried different microSD cards, tried different power cords, and nothing seems to make a difference.

These gaps come up randomly, and random times.

In the pic, most of those are on different days, some the same day but later on in the timeline.

The microSD card is NOT full, and, I see no other way to debug this kind of issue. By the time I noticed it, getting logs from the Cam would be too late, and also, it would be better to get the logs via the app, not do the remove / insert / remove dance with the microSD card.