I fixed it myself with 3M 4298 Adhesion Promoter and 3M Scotch 5952 VHB Tape. It has not come loose since me doing this! If you end up doing it yourself take your time, make sure everything is super clean! both the underside of the spoiler and trunk. I bet Tesla half the time doesn't clean the spoiler side and just tries putting more tape on.. it has to be pristine, no old tape left! then line everything up, have tape ready to hold it in place, then don't touch it for like 24 hours. Worked like a charm for me!