Colour emojis not displaying on published sites

[apriltaoyvr]

Bug description

Please describe.
If this affects the front-end, screenshots would be of great help.

How to reproduce

1. Add an emoji to a page
2. Publish changes

Additional context

Emojis display correctly on other sites and in the editor.

However, on the live site they do not.

Removing Apple Color Emoji,Noto Color Emoji, from --font-emoji fixes this issue. The problem seems to come from the CSS itself.