detached maximized tab doesn't keep size information

When I have gnome-terminal maximized and detach a tab, it should keep the size information of the original terminal window.

Steps to reproduce:
1. Open gnome-terminal
2. Open second tab in terminal via File->New Terminal
3. Maximize the window (either drag it to the top of the screen or click the maximize button)
4. Detach one of the tabs (either by dragging it away e.g. to a second monitor or via menu Tabs->Detach Terminal)

Expected result:
The new window should have the size of the original window before it was maximized

What actually happens:
The new window is not in maximized mode, but has the size of the whole screen. You can not resize it by clicking the maximize button in the top bar, only by doing it manually.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: gnome-terminal 3.14.2-0ubuntu3
Uname: Linux 4.2.0-997-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.17.2-0ubuntu1.4
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Sep 16 18:28:07 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-08-27 (20 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: gnome-terminal
UpgradeStatus: No upgrade log present (probably fresh install)