Steps to reproduce:
1. Create a VSTS project with a git repository
2. In VSTS project, create a Jenkins Service Hook
3. Create a pull request with an associated work item
4. Wait for the build to be triggered in Jenkins
The associated work item should appear in the UI of the build summary
The work item does not appear (see screenshot)
I also tried including the work item ID in the commit message (#1, in the screenshot below), but that did not have any effect.