Problem with pins/Selections

The problem is this:

In Pinterest, each user can have his own selection with pins from other users and the problem is that when I go to another user’s account, not all the pins that he saved are displayed in his collection.

That is, he himself sees all his pins, but I see only a part of them, for example, in the collection it is written that there are 20 pins, and I see only 10 of them.

No one knows how to fix it?

I tried to look on the website and on other devices with a different operating system.

I’m not the only one who has such a problem