if you did not get the error when trying to post in chat its because the error was there in real life but your browser showed the chat up because it did not auto refresh so really was was a cached chat window, if you refreshed the chat then the chat would have got the error.
since if effected all users it did not sent because it couldn't since there was and is a break in the network connection.
since you closed the chat, logged out or refreshed you now have that error.
hope that's what you meant