This doesn't explain why Deron would bother calling KOC/Miller. He doesn't need to. More importantly, it isn't in his best interest. What's in his best interest is to get benched. That's why I'm saying KOC/Miller, of their own volition, hurried in to put out the fires.
I agree that Deron specifically going to management at halftime after a fight isn't very likely. If they were fighting that badly for the last three weeks then it wouldn't come as a surprise finding out that management was close by the locker room at halftime. For all we know they've calmed down multiple halftime heated exchanges during the last month or so, and were on standby for the next (last).