Yep, Lae'zel just stopped following me too after a long rest, though I was in the Underdark. Loading the save just before the issue occurred and then long resting causes the problem to recur, but loading a save from a few days ago lets me rest and she still follows.

I wonder if this is a new issue with hotfix 27, or a recurrence of the issue that this post was originally about and was meant to be fixed with hotfix 25. And is it just Lae'zel?

Crimsonrider has also posted about this issue with Lae'zel at https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=824374#Post824374.

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"