greenhoper 4.1 does not refresh according to issue status after worklow post function

I am developing a workflow post function that on changing the issue status change the status of its sub-tasks.
So from the post function i trigger workflow action for each sub-task in order to close them. As a result the issue and its sub-task change status correctly in jira, but the Greenhopper does not update. (sub-tasks are still in column Open).
I noticed that in order to see the changes in GH after the post function was executed i have to go to some other lets say version and then come back. Then i already see the changed subtasks in column Close.
It seems some how the GH does not refresh properly.
(At moment i am with GH 4.1)