Backcourt?

[BryanV21]

It's not a matter of which player had FC or BC status, or whether the ball had FC or BC status, it's the status of said player and the ball.

The touch by B1 made it so the status of the ball, relative to the status of team A, was up in the air. Remember, BC or FC status is relative to that of the ball and both of the player's feet that is in control of the ball. The first touch by a member of Team A, after the touch by B1, was from A3 while she had gained BC status... hence, no violation.

Sidenote: I can't stop thinking of how to word this, so I can't stop editing. Sorry.