My Spider wobbles worse when hungry, but after feeding the wobble reduces and nearly disappears. As she seems to only become active when ready for a feed, perhaps her increased activity causes symptoms to increase. I just know that when well fed she shows near-normal behavior, just a bit skittish. I also wonder if eyesight has something to do with it, she seems to have trouble focusing on prey until they are very close, and blind(ish) animals can have orientation issues; something to think about at least.
I'm just happy she is quite healthy and a good eater otherwise.