I saw the datamined dialogue - it's not a bug, but poor character design. Even asking about his age is flagged as flirting. It's absolutely absurd. And it make Halsin come of as the worst sort of entitlement.

He was/is such a great character. They put effort into him, so the content that is there they could have made good instead they made him everything they were trying to avoid with Astarion.

I would speak of double standards, but since these issues only occur with characters written by the lead writer (Halsin and Shadowheart) in this toxic degree, I think the writer and lead, who was so concerned with the portrayal, got overruled. This is pure speculation of course.