Sequence-cut had cutted a lot or not

Okay, what the hell happened here? Mapillary

I had one 11525 photo sequence, it uploaded fine, no spikes, nothing out of order, things were great, and sequence-cut basically split it into multiple sequences seemingly arbitrarily. The sequences are side by side, but skip random photos.

This seems really strange for sequence-cut to do, because usually I’ve seen sequences broken into 1001 photo blocks, but in order. These are neither. Nor were there any long gaps.