Yup, I also experience this with my female Drow.

It was a bug in Early Access with the regular [Scale Mail Armor +1] which is now also happening with the full release unique version of the armor itself. There are more people experiencing the same issue; Yuan-ti Scalemail bugs out during conversations.

Be sure to report it to Larian directly; https://larian.com/support/baldur-s-gate-3#modal