The workflowProcessEnded event it's not working for notifications on subscriptions

Doing a subscription contribution as follows everything works fine except for the "workflowProcessEnded" event, looking at the code, it seems that the event is never thrown.

<notification name="Workflow Change" channel="email" enabled="true" availableIn="Workspace"
autoSubscribed="false" template="workflow" subject="Workflow event" label="label.nuxeo.notifications.workflow">
<event name="workflowNewProcessStarted"/>
<event name="workflowProcessEnded"/>
<event name="workflowAbandoned"/>
<event name="workflowTaskCompleted"/>
<event name="workflowTaskRejected"/>
<event name="worfklowTaskAssigned"/>
</notification>