Doorbell 3 Plus doesn't pickup delivery drivers

My Doorbell 3 Plus does not pick up Fed-Ex, UPS, or USPS delivery drivers. It picks up food delivery and any other people just fine, including myself, my partner, kids on the road, and sometimes even my neighbor's dog across the road... But it just will not pick up package delivery drivers. The only reason I know when I get packages is because I have a Blink camera running redundancy, watching the exact same spot. I would think it was the motion sensitivity -- if it weren't for how it picks up other people so well. It even picked up my porch pirate (sort of, very grainy), but not the delivery driver who dropped off that package. Has anyone else had a problem similar to this? How did you solve it?