Thanks for posting the picture. I own a manual box, so did not know what the auto selector was like.
Looking at the picture below, the black plastic part is either curved or flexable, so it rotates (moves) as you change gear position.
Looks as though its a strip down of the unit to see how it is fixed to the gear selector stick, and find a solution, Either a nut behind the black plastic part has come loose or needs glued back on (epoxy glue). Or curve might be on runners and has come away.
Just guessing, as you really need to strip it down to see operation. Maybe another auto drivers has a solution. Cheers.