Have played for a year and still enjoy it. But now seem to have a bug showing no chat at all. Cleared..

Glitches do happen from time to time with updates. I've not seen anything like this myself though. It maybe limited to your device type. If you have restarted the game and its still happening then you could try reinstalling if your game is successfully bound. this is a pain to do though.

If it is still happening then it may be worth reporting it to the developers as a game bug and let them know your device type (make / model etc) so they can investigate. Check the support page for the contact options.