When a server is not available (actually has been deleted), Studio continues to connect to it from the Log window.

It will never stop.

For Cloud servers:
Could we perhaps ask the controller after a while if that instance exists at all any longer? Some kind of diagnostics would be great.

1. Instance appears unavailable.
2. Instance does no longer exist. And here are available instances.

But in general the connection handling should be common for all the scenes (windows).
When trying to open a Realm for an old deleted instance, this is what' being displayed:

And if I then close the window, and "Connect to Realm Cloud" from the main window, this is displayed:

(counting down from 3-1, repeat forever)