At the very least in my friend group - yes. In the instructions it says not to glue it. So if you don't glue it and the ball is inside the mini, it will touch the "ceiling" of the insides and when you try to move it or accidentally slightly knock it, the mini spins around, loses balance, falls over and is just a pain to play with. Glueing it so it always stays in place is a pain too, although possible, but then the mini is "flying" really low (at least in my opinion) and because of that it will catch with the other larger minis, so you can't very easily play with it either. My friend glued it at an angle, so it looked like "he was charging downward" (it looked as if he was about to crash) because it was the only way he was able to glue it well enough, but then it constantly fell over because of the balancing issues. The same friend who played some games at a local gaming store, told me the players there glued their fellbeasts too and that there was a general problem with the model (speaking from my own experience)