It's worth noting you're only allowed to insultingly say someone has a mental illness in relation to their gender or sexual orientation.

Do not post .... Insults, including those about: ... Mental characteristics, including but not limited to allegations of stupidity, intellectual capacity, and mental illness, and unsupported comparisons between PC groups on the basis of inherent intellectual capacity. We do allow allegations of mental illness or abnormality when based on gender or sexual orientation, given political and religious discourse about transgenderism and homosexuality and common non-serious usage of words like “weird.”

Source: https://transparency.meta.com/policies/community-standards/hateful-conduct/

Edit: and the changelog is a hoot.