Zoho oAuth Connection not working

Zoho oAuth Connection not working

So my Zoho to Zoho app connections have stopped working. They have become "disconnected", anytime I try and authenticate them they work for a couple of seconds and then "disconnect" again.

Support suggested I create a new connection and edit every function in my system to use the new connection!

24 hours and still no resolution. Another critical failure from Zoho.