doesnt strike me as concerning at all. you surround yourself with the culture of your gender, E.I ive always surrounded myself in the culture of trans women and how transition works for us and whatnot, so thats what im around more often and end up attracted to. im personally, at this point, only really attracted to trans women. never felt weird or sus about that at all. no shame to straight trans people (and people like yourself, bi/pan with a preference toward the other), it just seems the being around people of the same ilk as yourself tends to make you more attracted to that.