Shot clock mistake?

[latterdaysaint]

Can anyone tell me if this has happened to them as an official.
I was attending a High School first round playoff game last Wednesday. It is in the 4th quarter with 5 seconds left in the game. The shot clock differential was 4 seconds. Team A is down by 2 points. Player A1 attemps a 3 point shot and misses with the ball grazing the edge of the rim and player A2 rebounds the ball and puts the ball back in the hoop for the score. Problem is after the ball grazed the rim the shot clock went off. Neither official saw the ball graze the rim. The officials had a huddle discussing the play and the basket was not awarded and team A eventually lost.
This did not cause Team A to lose because they were playing and shooting horribly during the game. They should have won the game hands down and this is just how the game ended.