Quoted from Gunnut40:The dragon wings are barely moving.
I just picked up a GOT topper and had the same issue. At first I thought it was the springs/clips, but it turned out to be the dragon's tail was pushing down too hard on the wing causing the mech to skip. I used a hair dryer to warm up the tail and bent it upward slightly so it no longer makes contact with the wing. It has been working great ever since. Hope that helps!