Over and back (backcourt) on back tap

Had a similar play last night. I was Slot opposite, ball got stolen and subsequently touched by the same team in their front court and back court but without control established. Trail blew a violation but looked kinda unsure. I saw the play and came over and offered information that I didn't think there was control in the FC to start. We fixed it but the coach who would have benefited was pissed, railed on me how we should have gone to the arrow since we "disagreed".