Lesson learned

[Rob1968]

Basketball Rules Fundamentals

16. The official's whistle seldom causes the ball to become dead (it is already dead).

Yes, we pass on some actions in some situations that, in other situations, we may find sufficient to warrant a whistle. In the play discussed in this thread, it's the communication, between partners, after the whistle(s), that is of greatest interest, especially to get a new season started.
The two actions, A34 from behind, B34 from the front, may occur so close to each other, that the only way to sort it out is that communication, and trusting one's partner and his/her judgement, to allow that communcation to be complete. I don't see a deficiency in the judgement of either official in this case.
Perhaps, the confidence between the two was such that the communcation was incomplete. But the OP and the responses are very helpful, and in fact I used what I have gathered in this thread, in two cases, yesterday, with partners in some BV fall tournament games. And because I made sure that our communication was complete, we got the plays and calls right, when both could have been problematic, especially with the two coaches involved.