This is just an insane tin hat theory but, if Prigozhin was to work with Ukraine he could probably cut the Russians off in Ukraine. All of their communication lines are in reach.

Ukraine is launching an offensive but has not committed their reserves and we don't know for sure where they are or what else they have available, they could have intended to put pressure on the south and draw Russian forces to that direction in order for them to pull of a sudden northern attack in coordination with Prigozhin, one could then say that those previous recons into Belgorod were connected to this.

Though of course we have not seen anything to indicate this yet, but it's a thought.