I'm so sorry you are having that experience. *hugs* I'm also very sorry if I have ever misgendered you. Even though I use gender neutral pronouns daily I'm still socialized to be gender specific. I'm looking forward to the day when gender isn't such a big deal. I truly believe that it is coming.
In case you don't know, when I use my phone on vertical/profile mode I can't read your signature. When I turn it horizontal then I can. I use my phone on vertical 99+% of the time and I suspect there are other members who do as well. I'm absolutely not trying to excuse unacceptable behavior. Homophobic or transphobic behavior is never ok. I'm just saying that there may be some people that don't know you prefer to use they/them because their phones are vertical.