Hi Ariel,
Thanks for your patience.
The floating document went to hidden state when main window is minimized it is an default behavior, because docking manager is present inside the main window and the floating document is an child of docking manager.So if main window has been minimized then the docking manager also went to minimized.
You can see the attached video file for default behavior of Microsoft Visual Studio IDE.Please find the attched video file.
Please let us know in case of any further assitance.
Regards,
Mutrhalagu.
VisualStudioBehavior_b33881b2.zip