That's strange, not only are people supposed to be okay with the sexuality of others but I thought she didn't care what people thought of her anyway.
Maybe her preferences changed? That can happen.
Of course people are supposed to be okay with it, but the entire premise of being in the closet is because some people are not okay with it. She might not care what people think but I bet her record label do. You're right, preferences might have changed but that is not what is generally said about her by people who claim to be close to her.