Changes to Collections are not saved

Hello.

How to solve the problem with changes not being saved in collections?

I add videos to the collection, leave the application active for an hour so that the changes are uploaded to iCloud. I check on other devices, everything is updated. The next day, the collection is in the old state without any changes made on all devices.

I did this on an iPhone, iPad, and Apple TV.

How can I solve the problem? It takes a lot of time to create collections and all the work is lost.

This problem was on the seventh version and I encountered it on version 8.0.8