One thing to keep in mind is that ANY ball python can have a "wobble". It's not common, and they can be caused by a variety of issues. Of course when one hears "wobble" one automatically thinks of spiders. But the behavior has been observed in other ball pythons and may or may not be the same as what we see in the spiders.
That being said, I have heard rumbles that womas are more prone to it than typical ball pythons, but I've not seen or heard any actual statistics or even anecdotal evidence that this is true.