I was thinking the same thing 👌 but I did a test and just pasted directly to my post (not in notes 1st) without tagging and it worked.
I tagged Moss 1st and THEN pasted the text.
I saw my text turned purple and I thought it was odd, but wanted to see how it would post. So I posted it and sure enough it excluded all of the text I had pasted.
So I guess it happened because I tagged him 1st and then posted the text in front of the tag. 🤷♀️ 