Camera sees some things but misses others

Hello all,So earlier this week, I put my Christmas tree on the curb for local recycling. I noticed yesterday that it was gone. My Ring is new to me, so I thought "cool, I'll see who took it". I logged into my account on my PC (because scrolling through two days of events is mind numbing on the app - please add filters to the app). I show a car passing my house at 5:46AM a car drives by and I can clearly see the tree sitting by my driveway. The very next event is at 7:01 AM when a person walking a dog walks by the house and "LO AND BEHOLD" the tree is gone.This is a 7 foot Christmas tree so it's not inconsequential. Why would I not have that activity show up, when it's clearly picking up people, and cars, and the time between was enough to not be related to timing.Any thoughts would be appreciated!b