Thisalee becomes unable to fly after you get lunarwing form. This causes her to bug out if you're flying around; she constantly falls and is reset to your position; my speakers are spamming her "flavor" dialogue of, "Lemme at 'em!" or "I've got your back, archdruid!"
If she's intended to permanently lose her flight form, at least give her a hippogryph to ride!
She's not all that strong anyway, the important part is the buff, which is permanently active in the world while she's set.
But yes, this affects all bodyguard type followers. At least ours only unsuccesfully try to enter flight form, other classes have to deal with them constantly spamming their spawn quotes.