Editor in seperate window -> open Files there, not in Creator Editor

[gde23]

Hello,

when i'm in QtCreator and i click the "open in new windwo" icon on the editor the editor is detached from creator as intende.
However, if i open a new file it is again opend i the empty space in QtCreator, where the editor has been before and not in the new window.

Can i change this somehow?