Hi,
Since this morning, some emoji like this are bugging in my doc. 
Am I the only one ? It was perfect until this morning
Cheers
Happy to take a look here,
Would you mind sharing your doc with us so we can take a closer look at the issues you’re encountering? Also, how did you add these emojis to your doc?
You can do that by going to the Share in the top right-hand corner, clicking the button in the top right (to the left of the “X”), and toggling on Share with Coda Support (the gif below shows how to do this).
Afterward, please send us a link to that doc in your response so one of our awesome Customer Champions can take a look for you! 
-Alison
We’ve gone ahead and filed this bug, thank you so much for reporting!
Sorry you were quicker to solve the case than me to give you more informations !
Thanks a lot 