A1 attempts a pass to A2. The pass is deflected by B1, A2 jumps to get the ball and only taps it while also in the frontcourt. The ball is heading for the sideline in the frontcourt and is saved by A2, sending the ball into the backcourt where A1 gains possession.
BC violation or no BC violation? The official called a BC violation, which is most likely correct, but for some reason I had thought that the deflection by B1 caused A to no longer have team control, even though A2 tapped the ball.