Hello,
so I was wrong about the mechanism but somewhere there is something to improve
Maybe next screenshot will give some answers, questions for sure
before auto update (and after refreshing page) everything is ok, but after auto update post with no any comments or any other actions is replicated (1)
Log about a comment which has been added 3 hours ago (2) - down there (screenshot don't showing that) is other log with embedded post which was commented - as it should be.
Everything is going to normal after refreshing page to the next auto update.
Maybe all this is related to caching issue?