Then open the editor and press "shift+enter" to update the view.

processing,
please wait

appears on left side and disappears then.
Now press "shift+enter" again, this time

processing,
please wait

appears, but does not go away.
Appending a space to editor window and pressing "shift+enter" again works once, but does not clean up when pressed 2nd time.

So the update mechanism is not prepared for "shift+enter" cleanup for 2nd, 3rd, ... time on identical source.

Regards,

Hermann.