Interesting ...
I asked that same question in the past ("has anyone ever produced a neurologic non-spider from a spider breeding") and didn't get many responses. But ...
This past year I produced a super pastel from a bumblebee x pastel. For about a month or so, the super had a mild head tilt. Twice now, I have observed him to spin backwards just like his bumblebee father does on VERY rare occasions, and just like his father, he snaps right out of it if interrupted.
His clutch did experience some severe variances in temperature during incubation, and he hasn't been seen to do anything "off" for some time now. I had written it off as a temporary thing from the temp. spikes.
Still ... It's interesting.