The root of this seems to be her saying in a conference speech:
“To give you an example, I never walk into a room in an all girls’ school and say ‘girls’ or ‘ladies’ because it is patronising, but also because there might be transgender people in the room."
and then in a later press briefing:
I was asked: "Can you talk more about the part where you said teachers shouldn’t use gender pronouns in case they offend transgender children?"
This is, quite clearly, not what I said. And I could see where this conversation was going. So, I decided to try and emphasise the benefits of using neutral language for all young people, rather than framing it as an inconvenient concession we have to make for the benefit of transgender people, alone.
The threats she received are completely wrong. As a separate matter, having wandered into a swamp of words and their meanings she seemed to be distancing herself from what she said in a slightly weaselly way.