Solution : https://service.sap.com/sap/support/notes/764707 (SAP Service marketplace login required)
Key words :
sort keyeach work item carries, dynamic columns greatly affects performance, dynamic columnsthe dynamic columns, dynamic columns improves, dynamic columns directly, work item container, wi content columns, task-specific basis, wf_bwp_select_filterthis badi enables, wf_bwp_obj_attributethis badi enables
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