unity-launcher opens new nautilus instead of bring up existing window

[BeowulfOF]

I have one nautilus window open but in background. I want to get this window back up to top through clicking on the launcher-icon that has the little arrow next to it, indicating, that there is an open window for nautilus somewhere.

Then an new nautilus window pops up, starting in my homedir, the old one stays in background.

$ lsb_release -rdDescription: Ubuntu 14.10
Release: 14.10
$ apt-cache policy unity8
unity8:
  Installiert: (keine)
  Installationskandidat: 8.00+14.10.20141013.2-0ubuntu1
  Versionstabelle:
     8.00+14.10.20141013.2-0ubuntu1 0
        500 http://de.archive.ubuntu.com/ubuntu/ utopic/universe amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: unity 7.3.1+14.10.20141016-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Wed Nov 5 13:35:08 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-10-25 (375 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: unity
UpgradeStatus: Upgraded to utopic on 2014-10-28 (8 days ago)