This was an intentional design change in 11, necessitated by the new windowing mechanism that allows you to drag those script windows outside the app window, off to a 2nd or 3rd monitor. The other consequence of this change is that those script windows no longer appear in the Windows menu.
and they call that an amelioration ??
For a 22" screen 1920*1080 it's a problem !!
They should have put that in the preference ON/OFF option
They change that but they can't make a new window appear leaving the main window full size ?!?! hoolala !! :O)