Which BP lines are known to have a wabble?

[The Serpent Merchant]

THanks, I assumed there was a selection bias for the sample of videos and from what I've come across (obviously not peer reviewed reading material) it seems like the wobble may present early and then become less pronounced or go away and others it may not present until later in life.

Yes, it can show up or go away at any time. Most display a very slight wobble when they are stressed or excited but the rest of the time they do not.