Modification of item type did not take effect in UWL
The work item registration process involves identifying each system by its alias, and then generation an XML description of how to process the work item types to be received by Universal Worklist from each system. That is why the WebFlowConnector must be re-registered in case you have changed task definition for the task type.
Item type modification
Re-register the WebFlowConnector
Note: The changed task type must be activated in the backend.