ARKit Session Paused and Not Resuming

Question

In my ARKit app I am presenting a modal window. When I close the modal and go back to the ARSCNView then I find out that the session is paused due to this code:

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Answer 1

I don't know if the iOS 11 GM Seed or XCode 9 GM Seed versions fixed this today however I can successfully resume a paused ARSCNview with code as in the original question.

sceneView.session.run(sceneView.session.configuration!)