2953003 - Custom attributes are not displayed in My Inbox

Custom attributes - configured via RSWD_MAINTAIN_USER_ATTR report - are not available in My Inbox Fiori application. This includes both general custom attributes for tasks and custom attributes in List View (CustomTaskTitle, CustomNumberValue, CustomNumberUnitValue, CustomObjectAttributeValue, and CustomCreatedBy).

• Task Gateway
• Gateway Business Workflow Enablement 
• SAP Business Workflow
• SAP NetWeaver
• SAP Web Application Server for SAP S/4HANA
• ABAP PLATFORM - Application Server ABAP
• SAP Gateway
• My Inbox Fiori Application (on-premise)
• My Inbox Fiori Application in SAP Fiori Cloud

WF_GDPR, SWF_WORKFLOW, SBWP, Dynamic Columns, SWL1, BADI, CustomTaskTitle, CustomNumberValue, CustomNumberUnitValue, CustomObjectAttributeValue, CustomCreatedBy, expert view, showAdditionalAttributes=true, /IWWRK/BADI_TGW_CUSTOM_ATTR, TASK_DEFINITION_ID, /IWWRK/IF_TGW_CUSTOM_ATTR~PROVIDE_ATTRIBUTE_DEFINITION, Read custom attributes definition, /IWWRK/IF_TGW_CUSTOM_ATTR~PROVIDE_ATTRIBUTE_DATA, Read custom attributes value, navigation property CustomAttributeDefinitionDat, CustomAttributeDefinition collection, /IWWRK/ES_TGW_CUSTOM_ATTRIBUTE enhancement spot, http://<server:port>/sap/opu/odata/IWPGW/TASKPROCESSING; mo;v=2/TaskCollection(SAP__Origin='<SAP__Origin>',InstanceID='<instance_id>')/CustomAttributeData, active implementation of the /IWWRK/BADI_TGW_CUSTOM_ATTR BAdI is filtered for the affected task, TGW_STD , KBA , OPU-BSE-WFM , Gateway Business Workflow Enablement , BC-BMT-WFM , Business Workflow , CA-INB-FIO , Fiori UI for My Inbox Application , OPU-BSC-TGW , Task Gateway , Problem