Software Updater window becomes invisible if it starts during screen lock

[kolen]

 - Lock screen (including by timeout)
 - Wait until Software Updater starts automatically
 - Unlock screen
 - Now you can see the Software Updater icon in Unity panel/dock, but there is no Software Updater window. Clicking dock icon does not bring it to front, window remains hidden.
 - It's possible to right-click the dock icon and click "Install all available updates" or to quit. It works, updates can be installed this way, but window does not appear, even after install.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gnome-screensaver 3.6.1-0ubuntu13
ProcVersionSignature: Ubuntu 3.13.0-26.48-generic 3.13.11
Uname: Linux 3.13.0-26-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Fri May 16 12:48:07 2014
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GsettingsGnomeSession:
 org.gnome.desktop.session session-name 'ubuntu'
 org.gnome.desktop.session idle-delay uint32 300
InstallationDate: Installed on 2013-10-23 (205 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: gnome-screensaver
UpgradeStatus: Upgraded to trusty on 2014-04-18 (27 days ago)

[Umut Karcı (cediddi)]

This affects me too. I also found a defunct debconf-communicate in my processes. It vanished after I close the update manager.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Colin Law (colin-law)]

@kolen have you got workspaces enabled? If not get the fault condition then enable workspaces (All settings > Appearance > Behavior) and see if the window is on another workspace.