Can't switch between maximized windows of the same program sometimes

[Teo]

Note: this is intermittent and I don't know of a way to systematically reproduce this, but I've observed it dozens of times.

- I have two windows of the same program both maximized
- I click on the program's icon on the Launcher (one icon with two tips indicating there are two windows open)
=> the downscaled previews of the two windows are shown one on top of the other as expected
- I click on one of them

Expected result: the one I clicked should get focus and be brought to front (maximized, as it was)

Observed result: whichever I pick, only one of them, systematically always the same one, will get chosen. That is, if I click on window A, it's window A, if I click on window B, it's window A allthesame.

Additionally, the title bar on the top of the screen is not displayed.

I can click on the foreground window (which is not the expected one) and interact with it.

If I click on the top of the screen, where the window title is not shown, then the correct window will be brought to front (not sure this _always_ work, but I have observed it sometimes).

One thing that "fixes" the issue is to de-maximize both windows and then remaximize them.

I've only observed this on maximized windows.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.2+14.04.20140714-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
Uname: Linux 3.13.0-36-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Mon Oct 6 20:00:03 2014
InstallationDate: Installed on 2013-10-11 (360 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: unity
UpgradeStatus: Upgraded to trusty on 2014-05-24 (135 days ago)