Team control, throw-in, IW

[just another ref]

This is deeper than just the debate about team control. In the OP, assuming the ball hit the bottom of the board, this should have been nothing, but was called a violation. But now what to do if this incorrect whistle sounds a split second before the ball is grabbed out of the air by team B? I'm gonna let the incorrectly called violation stand rather than change it to an accidental whistle and give the ball back to A.