Shu explained it that the second after the void is released (dropped, put away, anything else) the void should have disappeared and returned to the owner. Hare had her void weaved around her arms so she could use it at any time, and it was shot and shattered.
That other girls Void that was dropped on the ground and crushed under the ceiling bars that fell down, that makes no sense cuz it should have disappeared before it even landed on the ground. It was only done to force this on Shu so he could go mad again. That girl was technically a redshirt. New, had a good Void, but expandable.