Webapp icon disappears while navigating a web page

If I go to say launchpad.net the webapp icon appears in the Launcher. Now if from launchpad.net I browse to translations.launchpad.net or bugs.launchpad.net, the icon disappears.

It is quite probable this is a problem with the webapp itself, so correct me.

* What happens *
If I navigate within a webapp site, there's the possibility the Launcher icon disappears (for example, go from launchpad.net to bugs.launchpad.net).

* What I expect to happen *
The webapp integration should be able to recognize that, for example, launchpad.net and bugs.launchpad.net belong to the same webapp, so the icon won't "toggle" visibility.

Description: Ubuntu Saucy Salamander (development branch)
Release: 13.10

unity-webapps-service:
  Installed: 2.5.0~+13.10.20130919.4-0ubuntu1
  Candidate: 2.5.0~+13.10.20130919.4-0ubuntu1
  Version table:
 *** 2.5.0~+13.10.20130919.4-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ saucy/main i386 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: unity-webapps-service 2.5.0~+13.10.20130919.4-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-8.15-generic 3.11.1
Uname: Linux 3.11.0-8-generic i686
ApportVersion: 2.12.4-0ubuntu1
Architecture: i386
Date: Tue Sep 24 12:24:59 2013
InstallationDate: Installed on 2013-08-31 (23 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha i386 (20130830)
MarkForUpload: True
SourcePackage: libunity-webapps
UpgradeStatus: No upgrade log present (probably fresh install)