REST WS import issues with translator and data source

When I am trying to import from REST WS and create a VDB I have to set translator manually and TD also isn't able to deploy datasource for this VDB.

(I am not sure if it is a bug, but when I am importing from SOAP WS everything works fine)

Screenshots attached

TD 8.6.1.Alpha1 + DV 6.1.ER2