Thanks for the reply.
post related (4.11 issue)
But its not working as intended (4.11.2 built from source), you dont need to select Single best to make pathing grid work or add a test to show the grid (as shown on the tutorial). also, the context override function (as shown in Setting Up Advanced AI | Live Training | Unreal Engine - YouTube doesnt works either)
but im glad its working as intended on 4.12, that means it actually got fixed.