Workflow graph not refreshed

1. install Nuxeo
2. create a workflow in Studio having 2 tasks and name it testTask.
3. create a document and start the workflow on it
4. view the graph (see picture1.png)
5. validate the task
6. click View the graph in the new task (see picture1.png)
7. observe the graph has not changed and the previous task is still in blue
8. reload the page and click View the graph
9. observe the current task is displayed correctly (see picture 2.png)

Expected behavior: the current task should be blue. (see picture 2.png)