All combo morphs that carry the spider gene are just as prone to 'wobble' as plain spiders are.

Sometimes ordinary hatchlings will shiver or tremor when they're stalking prey, but not to the degree that spiders do.

I think that 'wobble' is misleading, as a term--the problem includes far more than just wobbling itself. It can be all or any single one of the following:

A tendency to tilt the head slightly to one side.

A tendency to spend time with the head upside down, and be slow to right the head (though they appear to know which way is up eventually).

A Parkinsons-like tremor when the head is held up (wobble).

Spinning (coiling in rapid circles abnormally, often when the head is touched).

Missing--they are prone to miss prey on the first strike. All balls can do this sometimes, but spiders may do it frequently--they generally turn and come right back for it, though.