Passing NID argument from views to panelizer
I had the exact same setup and issue. I could see the title of the view pane but no content even after I had made sure to set Argument input:Edit (in content pane view) to be:


Argument source: From context 
Required context: Content ID


The reason I was not seeing content and only the title of view was simply because I'd forgotten I'd made a tpl of that view and had not yet cleared cache...