When opening a note, the note and two empty ones open

Things I have tried

Out of the sudden Obsidian is behaving strangly: when I open a new or an existing note, two more empty notes are opening, in kind of a kaban-manner.
I was thinking, maybe that’s a problem with a plug-in (I have some installed), so I turned them of and on, but it didn’t help - in fact, it’s worse now: there are FOUR empty notes opening with the one I need.
Anybody knows, what the problem might be?

What I’m trying to do