Is this just a one-time glitch or is it supposed to look like that?
Yes that’s how is should look. The text inside the colon is just an emoji that didn’t appear. For ex: :happy_face:
But, should the emoji appear?
No, they should not , because of the discourse formatting that the IFC chose, emoji’s will only appear when written from an iOS native device using the “emoji” section of the keyboard.
Ohhh, ok, thank you.
And to further add on, this feature is not available anymore, thus we see Unicode instead of the emoji.