The launcher doesn't show “several windows are running” mark

[Alexey Kulik]

[The bug]
When a new window is opened by an application which is already running, the launcher doesn't change the mark at the app icon “application is running” (a small triangle at the left of the icon) to the mark “two windows of the application are running” (two small triangles) or to “several windows are running” (three small triangles). When a new window is opened by clicking the middle mouse button on the app icon at the launcher, the mark reflects correctly the number of windows.

[Test case (to be continued...)]
1. Open one window of any application, say Files or Firefox.
2. Open Preferences dialogue window: Edit -> Preferences.

[What is expected]
The corresponding icon on the launcher should be marked by the two-triangles mark reflecting the fact that two windows of this app are opened.

[What happens]
Nothing happens. The mark remains to be in one-triangle state.

[Test case. Part 2]
1. After that, click on the app icon in the launcher to reveal the Spread mode.
2. Only now, the mark will turn into two-triangles state.
3. Click on the Preferences window to leave the Spread mode.
4. Close the Preferences window.

[What is expected. Part 2]
The corresponding icon on the launcher should be marked by the one-triangle mark.

[What happens. Part 2]
Nothing happens. Though there is only one window of the app running, the mark wrongly stays in two-triangles state.

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: Thu May 1 19:26:21 2014
InstallationDate: Installed on 2014-01-27 (94 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140124)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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

[DavidBriscoe (idbrii)]

Also occurs for me. The indicator seems to only update when the application loses focus instead of when the current window loses focus (which would catch every case except if an application opened a window in the background). So alt-tabbing to another application will fix the window markers.

Open Terminal
Open Chromium
New window. (I now have two chromium windows open but only see one marker.)
Switch to Terminal. (Chromium now correctly shows two window marker.)
Switch to Chromium.
Close window. (Ubuntu switches to terminal since it is the last window active. Chromium correctly shows one window marker.)