Does your emoji keyboard also allow arbitrarily adding Variation Selectors 16 (aka Force Color Emoji Presentation, U+FE0F, or UTF-8 EF B8 8F), also used after a few emoji in the code? (It probably does insert one for characters like ♀️ whose codepoints default to non-emoji but you’ll need a non-emoji-compatible text editor and keyboard to separate it)

Edit: that’s probably only a concern with the MANDEL.COM program. This 141-byte one uses variation selectors the normal way.

Edit: except ♐, which does NOT get one but should