When I shake my Nikon 85mm 1.8g, something rattles inside the lens. However, when I manually focus to infinity, the rattling goes away. However, when I turn the manual focus ring even a tiny bit away from infinity, the rattling goes back. I have attached a video of the issue. 
Update: It seems like there is a loose element, here is a closeup.

Update: It seems like there is a loose element, here is a closeup.
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