I’d also venture to guess too that It’s a local issue. If you really want to know, its best to drive to your local FedEx hub and talk to the hub leader directly. Tell them you want a 3-way conversation with the driver to discuss. If in doubt, sometimes I will login and re-route the package to a real FedEx Office for pickup - the day it leaves the original sender’s pickup site. I do this for all valuable packages.
These issues can happen with FedEx, UPS, DHL too depending on your local drivers or concerns they might have at your particular drop-off location. I found out once a driver did not feel comfortable dropping a package over my gate, worth checking why if this keeps happening to you. May be more to the story...Best of Luck.