Neighbors Security Cam Floodlight Turns On First

I have a weird issue or unexpected behavior. My neighbor's security cam appears to detect me before my security detects me. Their light will turn about a second before mine. My smart flood light also seems to detect before the security camera as well. When I've asked my neighbor, they've checked their settings and don't see any issue. (they're not receiving alerts.) Not sure how to troubleshoot or tweak my settings. My set-up: My neighbors and I have detached garages. Cars enter the garages from a rear alley. My neighbor has a security cam on both sides of the garage. I have a security cam on the backyard side pointing towards the house. I also have a smart light on the house that faces the garage. (My devices aren't linked at the moment.) The security cameras are roughly 30ft apart. Our garages are almost inline but the neighbors garage sits back slightly. There are arborvitae shrubs along the property line that would obscure the camera. When I exit my garage to go to the house, I'll take a step or two away from the garage and then the neighbor's light comes on then mine. Joe