Not all photos of positions are uploaded to one of the sections of the catalog. How to fix?

Question

JavaScript

For some reason, in one of the sections, photos from 1s to Bitrix are not uploaded to certain positions.
Tried "Forced loading of pictures" from 1C - did not help. I tried to insert directly into Bitrix, but after the data exchange, the pictures disappeared again.

The reasons are not entirely clear. They weigh a little (about 300-400kb), the resolution seems to be also suitable (like other positions from 1s).

What is the reason to look for?
Thank you in advance for your indifference))