I loaded the new desktop client (2.2.3 (build 4)) on Windows 10 and linked it to a NC10 and an OC9.1 server.
It has notifications set. Every so often, I get an Action Required Notification from it for one or other server stating that action is required.
I look in the Action Centre - but nothing there. Hence “phantom” in the description.
I have searched in Notifications and found that Banners are on - but Show in Action Centre is off.
So, yes, answer ay be to switch it on then. But should that not be the default if notifications are to happen?
There is nothing in the client windows to give a clue as to what the issue is.