RTC - GitHub Enterprise integration: cannot set time spent on GitHub's side.

Hi,

I have an RTC project area integrated with a repository in GitHub Enterprise (GHE). The integration was done following the instructions in http://www.ibm.com/support/knowledgecenter/en/SS2L6K_6.0.1/com.ibm.team.connector.cq.doc/topics/t_git_hub_ent_commit_linking.html .
I created a commit change in the GHE repository, entered a comment mentioning the work item type and work item ID and the time spent. This was done following the instructions in the image shown at the bottom of this page: https://jazz.net/products/clm/features/clm_integrations.
The problem is that only the work item status was updated on RTC's side. Time spent attribute remains blank and the update in time attribute is not reflected in my RTC project.

Could you please tell me if I am missing something or misunderstanding something? OR is there any bug in the RTC application not allowing to recognize the syntax being used on GHE's side?

Thanks,
Vicky.

Additional information:
- RTC's Project area is based on the Scrum template and has some minor customization but nothing impacting work items' configuration.
- RTC's Project area is in a server running on jazz 6.0.1 iFix003 platform.