I should stop giving editor advice without actually testing it myself first.
The fact that it renders through the character is completely intentional. Additional work is needed to obstruct the post process line, and this is a very basic outline material. I am taking issue with the fact that your character itself is rendering on top of the obstructing character.
At this point I don’t believe I can provide any help. Your images provide two conflicting behaviors. I apologize and wish you the best of luck with a resolution.