Why done Robes of Summer include pants?

[Red Shoe Paul]

I got the robes of summer, but they dont include pants. I'd rather not be walking around with everyone able to see that I'm wearing Karlach's underwear, how do I get pants?

[The Ⓐrrowheads]

I am having this exact issue as well on my masculine rock gnome wizard avatar. I've made all of my party/camp equip it for testing purposes, including a small-sized hireling. All of them displayed the robe of summer's correct trouser model, except for my gnome avatar.

I'm gonna send a bug report to Larian right away.