Bisexuals always trigger gender dysphoria?

Hello everyone.

I met a guy who turned out to be trans, I'm cis. Things were going well until I revealed I'm bisexual, which destroyed his attraction towards me. He still wanted my attention, but was not approaching me the same way romantically or sexually. The change hurt and I shut down, but then I thought I should try to read about how transmen relate to bisexuals to see if there is something there. I looked through trans forums and even though I can see how it makes sense, it still surprised me to learn that being desired by a bisexual can trigger feelings of gender dysphoria for trans people.

Is this inevitable?

edit: To answer a recurring question in the comments - no, I did not mention being bisexual in relation to my attraction towards him at all.