Tunnel Bore does not drop mined blocks/items into attached chest carts

When a tunnel bore is boring, mining blocks along the way, it should be possible for a chest cart attached to the tunnel bore to collect the items that are mined by the tunnel bore. In the current version, the tunnel bore will continue to drop items loose onto the ground behind it, as if a chest cart was not attached to it, whether or not a chest cart is actually attached to it.