Hello. Sometimes in some specific situations that i have no idea about i am unable to write in chat.
The only thing i know - it does always happens when i am trying to press t (all chat) while crouching. This is how does it ussually happens - on the server with airstrike i am getting my killstreak, then crouching in the cover, pressing t, and then chat dies. Not completely - i still can read the chat, but i am unable to write. Reconnecting to server helps, but i lose score. It's nor really alot, but still. And also i do lose my airstrike.