My guess is that when they do QA of the assembled Mavics, they power them on and run some tests, and since this is a moving part and is quite bouncy, sometimes it could rub against the plate and leave a scratch, which would be unacceptable to ship to a customer. So, they put a film to avoid that. It has a stronger adhesive to avoid accidental peel off during initialization. This sticker has no functional effect on Mavic. To me, having a yellow tab there is like buying clothes and leaving the tag with barcode and price on it.