Window name filtering in scale mode unmaximize windows

[Jooj]

Ubuntu 14.04

To reproduce :

-Be sure to have at least 3 windows fully maximized.
-Use Super-W to be in spread windows mode.
-type the name of a windows with the new windows name filtering feature in 14.04.
-Push Enter (don't use the mouse).
-Use Alt-tab to switch to another windows: this windows is not anymore fully maximized (i.e. top bar and window title bar are not merged, see the attached file). Impossible to merge again the window title bar and the top bar (you need to use again spread mode and use keyboard filtering for this windows or use the mouse to click on it).

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.0+14.04.20140423-0ubuntu1.2
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Sat May 3 22:18:24 2014
InstallationDate: Installed on 2013-04-25 (373 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
ProcEnviron:
 LANGUAGE=fr_FR
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to trusty on 2014-04-18 (15 days ago)