Disappearing Room Glitch

Though extremely rare, rare on zen mode and possibly on only some devices, the Disappearing Room glitch can occur at any time , although it is extremely-extremely rare for the blank door before the disappearing room glitch occurs.
 * 1) The next stage you enter will not have anything visual, except the balls you throw, powerups, shadows, the door outline, and the background color, there is also a blank door at the end.
 * 2) After passing this stage, the next stage might consist of nothing. No solid surfaces, no objects, no music... just the endless abyss of echoing after throwing a ball, and a white background.