Had almost this exact play happen. I was standing in my legally appointed box and the ball flew into me. I didn't catch it but it hit me square. No time to avoid, and really no reason - I didn't prevent the closest player from making a play, even though she was pursuing the ball.
The opposing bench screamed, the ref got that cartoonish wide-eyed oh "shoot" expression on his face, then opted to call if off the "black" coach, white ball (this is a color of uniform description, not a racail commentary by the ref
). I tried to explain that I was not a player and the ball can only be oob off a player, and he told me that I had to avoid the ball - if I got hit, it was off me. Must be one of the new rule changes I didn't read yet.