As of now the Shared cluster issues have been fixed and the system is mainly back to normal, including group chats functionality.
Only issue remaining is group chats will not automatically initiate push notification alerts to offline users. This is due to a change in architecture which we had to urgently implement.
Please bear with us until we restore this functionality.
Enterprise users were not affected by these issues.
We apologise for the inconveniences caused to the user of our shared plans, over years we have kept our uptime for all user tiers over 99.5% and this is a first time we experienced service failure for a prolonged period of time. We are committed to improving the stability of the service going forward.