Look at it this way:
Red BC makes a line break. Blue is chasing. Another Blue defender tackles the Red BC.
If the Red BC offloads before he hits the ground then there is no tackle, no tackle zone so the Blue chaser can't be at fault for catching the offload.
If the Red BC offloads after he hits the ground then a tackle has occurred. The timing difference here is in milliseconds.
No player can process and act in that time frame. Play on.
I don't think the referee could either, so it wouldn't be C&O, but if the BC was clearly brought to ground before popping up the ball (and I regularly see players take a second or two to do this) then it would be obvious and could be penalised.