for doing the custom pick load and custom pick-drop of an sales order and after that ship confirm

Hi,
We need to develop a new custom mobile screen for assigning a task to a employee and to complete next steps like load task and drop task for a sales order

by using wms_task_mgmt_pub.modify_task i can able to assign a task for a wms person/employee

after that i am using the inv_pick_wave_pick_confirm_pub.pick_confirm for pick_confirm but i am failing the to associate the mmtt record and wms_dispacthed_tasks.task_id in maintaining a same task in two tables

and in mean tym once pick confirm is launched the mmtt record is getting cleared but the wms_dispatched_tasks table is not updating and even the task is showing in completed tasks still it is showing in queued only