I mean Wagner is an army for hire. This could’ve been the military equivalent of an employee strike. He didn’t think they were getting enough support/money for the bullshit the kremlin was putting them through, so he stopped acting & threatened rebellion, Russia may have said “fine we’ll pay you more/give you more support” which gave him reason to go back to the war.

Honestly who tf knows what happened. None of us do and we probably never will. There’s endless possibilities for what’s happening.