Custom itemtype name for completed tasks not applied by uwl

Hi experts,

my question refers to custom uwl configuration. Why were custom itemtype names for completed tasks (uwl.completedtask) not applied or recognized by the uwl? With pending/open tasks (uwl.task) its possible to rename the itemtype.

Example:

This is working:

<ItemType name="uwl.task.webflow.myteam.iac.TS12345678.SAP_ECC_XXX" connector="WebFlowConnector" defaultView="DefaultView" defaultAction="launchIACService" executionMode="default">
<ItemTypeCriteria systemId="SAP_ECC_XXX" externalType="TS12345678" connector="WebFlowConnector"/>
[...]
</ItemType>

But this is not working, the uwl can't match this itemtype name to the corresponding task id:

<ItemType name="uwl.completedtask.webflow.myteam.iac.TS12345678.SAP_ECC_XXX" connector="WebFlowConnector" defaultView="WorkItemsCompletedView" defaultAction="doWFMessage" executionMode="default">
<ItemTypeCriteria systemId="SAP_ECC_XXX" externalType="TS12345678" connector="WebFlowConnector"/>
[...]
</ItemType>

To provide a custom configuration of completed tasks it's only possible to use the standard naming of these items

<ItemType name="uwl.completedtask.webflow.TS12345678.SAP_ECC_XXX" connector="WebFlowConnector" defaultView="WorkItemsCompletedView" defaultAction="doWFMessage" executionMode="default">
<ItemTypeCriteria systemId="SAP_ECC_XXX" externalType="TS12345678" connector="WebFlowConnector"/>
[...]
</ItemType>

But why it's possible to set a custom itemtype name for the "uwl.task"-items and not for the "uwl.completedtask"-items? Why does the uwl not recognize the custom nam for the completed items? Am I doing something wrong, or is it still not possible, but why?

btw: we need to rename the itemtypes to structure a very complex uwl configuration

It would be great if someone can help :-)