Hmm, probably just a coincidence, but on the positive side that would block macros... where you could press 1 button to send a whole sentence in an effort to distract your opponent.
To answer your question I guess they just didn't include that functionality.
A few days ago it was possible to paste messages in live chats.
Hello.
When I'm watching a match and trying to paste a text that I already copied in the chat, I can't, nothing appears. When I do a test on Notepad, for example, I can. What can it be?
Thanks.