When there are tabs in a username then when you tab complete the username the tabs are included but to ping the username you must omit the tabs.
Note that the reply feature (beginning a message with
:<msg number>) still functions normally.
Steps to reproduce
My chat username is
(Note that while my username contains 28 tabs, one tab is sufficient to cause the problem)
Enter a chatroom such as the sandbox and type
@0 into chat. A suggestion will appear for a username that appears to be
@0 '. Hit tab. The full username will appear in your chatbox (including the 28 tabs). Send the chat message. I will not be pinged and when hovering over the chat message the username will not be highlighted. Type
@0' into a chat message and send it. The username will be properly highlighted and I will be pinged.