Unusual WebKitWebProcess initaliztion problem makes WebView blocked and unresponsive.

1)
Description: Ubuntu 14.04.1 LTS
Release: 14.04
2)
apt-cache policy libwebkitgtk-3.0-0
libwebkitgtk-3.0-0:
  Installed: 2.4.7-1~ubuntu1
  Candidate: 2.4.7-1~ubuntu1
  Version table:
 *** 2.4.7-1~ubuntu1 0
        500 http://si.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     2.4.0-1ubuntu2 0
        500 http://si.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

Hello
 I have been experimenting with my custom app that uses webkit2gtk.
While testing I have encountered one strange thing.

Usually when WebKitWebProcess crashes or or is killed for some reason, then "web-process-crashed" signal is emitted in UI process. WebProcess is respawned and everything works fine after that.

But sometimes very rarely when WebProcess is being re-spawned, process locks somewhere, leaving WebView unresponsive.

The only solution (without restarting the whole app) is to kill WebProcess, which will cause UI process to re spawn new WebProcess. Now after reloading the page everything works fine again.

I have investigated problem further and I have discovered that locked WebProcess is running with only one system thread.
This was unusual for WebKitWebProcess which usulay runs with several threads.

After attaching debuger to such process I suspect for the problem to have something to do with "dbus_launch".

In attachment I have provided stack trace for a process in souch state.
Best

Miha

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: libwebkitgtk-3.0-0 2.4.7-1~ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
Date: Tue Jan 27 08:38:14 2015
InstallationDate: Installed on 2014-12-12 (45 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: webkitgtk
UpgradeStatus: No upgrade log present (probably fresh install)