Pinged users not displaying at textarea

[ghost]

I have a list of items with a "read more" button. Each of these open up a modal with their specific data and displays the comments below it. All works except the pinged users that dont display at the textarea when using the "@" sign, it places it somewhere at the top of the modal or out of the screen.

Is this a bug or am I missing something ?

I posted the issue on stack over flow, to give you more context : https://stackoverflow.com/questions/52903804/viima-jquery-comments-getuserspinged-users-displaying-incorrectly