Fletch
Smash Master
Pretty well known glitch. Quoted from the wiki:Was playing on Five with my friends yesterday and there was no random box. The TV monitors clearly showed it should be upstairs but it wasn't. We all went to every room and it wasn't in any of them making fire sales the only way to get it.
"There is a known glitch that can be very unfortunate for players. If a Fire Sale is received when a player gets a teddy bear in the box, or when the box is moving and technically does not exist in the map, then after the Fire Sale is over, there will be no Mystery Box anywhere in the map, ever again. The map will still show where the box is supposed to be, but the box will not be there. The only way for players to use the Mystery Box again after this is through the use of another Fire Sale. "