I got that issue due to a missing clip (rear driver side), Mobile service came to my house with extra clips (I was missing a couple from the factory) but told me the wheel liner need to be replaced (which is covered under their warranty), he created a request for that and 10 days later the Mobile service when to my work location and arrived with more clips, he said Tesla didn't order the part and he created another request, so I placed another request at my Tesla Service Center (Coral Gables). When I went there I was told they received the part but it was not covered by their warranty, that I will need to pay... so I told them ok, don't do it but I will complain with the corporate office... so he said he will do it as gesture/complimentary.
Make sure they get the part and get the Mobile Service, don't waste your time going to the Service Center, sometimes take longer.