hmm i see, maybe. thanks for the info and reporting it.
I'll keep an eye out for it as for now i'll close the this issue.

Also what language is your youtube?

either way should be fixed with new update :)

Hmm i can't seem to replicate the issue, is this in the new youtube ui?

Hey it's a feature ^^' it only does it to channels you are subscribed to.
If you want it to stop uncheck the checkbox "sub&noblock" under the video