Shathann always refers to Rook as a man
In Taash's quest Fire on the Sands, at the end when you meet Shathann she comments that it's unusual for Taash to be interested in men. The first Rook I played was male so this was fine, but the second time I made a nonbinary Rook with a masculine body and voice and got the same line. This struck me as odd, but it could make sense if Shathann isn't familiar with nonbinary people at this point. It suited the character so it didn't really bother me.
For my third playthrough however, I made another nonbinary Rook, this time with a feminine body and voice. I just finished that quest and the same line triggered. I haven't played as a female Rook so I don't know what she says in that situation, but it seems like she's flagged to always comment on Rook being a man if they aren't specifically a woman.
ETA: It sounds like this dialogue triggers when Rook is a woman as well, so it's just straight up bugged.