Blew this one on Saturday..... Or at least my partner did....
Similar situation except ours was on a pass. A1 passing to A2, B1 tips ball up and back and A2 tips it into BC trying to recover.
I was trail and called BC, coach goes nuts, partner comes in and says that team control was lost on the pass and since there was no team control A could recover. He calls inadvertant whistle, A's ball.
Him 20 years + Me 3 yrs = Me lose
Bugged me all freakin day.