Brief bug description
When staging is turned on, creating a new user from Admin UI generates new Staging Tasks for the user object. But when using the ADImport to import new user, users will be created inside the Users App, but there is no staging tasks generated for the new users.
Client need to run the import on STG and sync new users to PROD, which they can't do easily without those tasks. The current workaround is to sync the whole USERS sub tree.
The above is for client's v11. I just downloaded v12 EXE and looks like it's working the way it should be.