Sometimes, it seems the applets wants to connect while there is no network connection (I have no idea why, perhaps a race condition).
The main resulting issue can be reproduced by clicking "Go online" without any network connection : it enters "connecting" state forever, and there is no way to cancel it (even the "Offline" item in the context menu does nothing).
As soon as a network connection is available, the "Offline" menu item works again.

Reproducible: Always