I guess it could be caused from neurological issues from inbreeding, but man it looks alot like ibd! The symptoms would most likely be the same though since they would both be neurological stargazing! I think the spider wobble comes from the spider gene it's self and not inbreeding since the spider is a codom morph and is outcrossed all the time, but i have never seen one with the wobble that bad and that's why i thought ibd!