It appears that Plus! emoji still work when typed manually, but the special emoji section of this window is gone. I was able to confirm this issue in post composer and comments box
This is marked as solved but I’m still able to reproduce this. Howover this only happens when replying to an already existing comment and editing a post, not when entering a new comment or creating a new post, for some reason. Can someone reopen this bug report?
ive marked this as unsolved - we're aware of it and its on our list to fix.
This issue has been fixed for real now, sorry for the inconvenience!