Mr Red wrote: ?? = �� (not even in preview!)

These 'surrogate pair' emoji codes are strange. I'm not sure why they exist - even after reading about them.

There is an html entity code for 'OK hand' here: 👌 Let's try that: 👌

(I can type either the double or single entity codes into a google search and it converts it to the 'OK hand'.)

Hmmm.