This happens not really because of the gender of the person but because in Spanish things have genders: The moon is a she, the sun is a he, etc. and ChatGPT confuses that and the fact that in this context that distinction makes no sense.
Usually Spanish speaking non-binary people use also “no-binarie”, something that doesn’t exist in the language, for now at least, but wipes out the gender.
I’m not an expert, thought, just a native Spanish speaker.