Photo for vk API, what is the difference between a PC and a phone?

Question

Python

There is a bot that accepts photos, but if the photos are uploaded from the phone, the bot does not want to send them, although if you upload from a PC, the bot sends photos.
Does not depend on the photo format. Does not depend on the user.
Who knows what it is connected with?
The bot works on python, on the vk.api library