My solution to a stable outdoor motion sensor was to make my existing dumb motion sensor, that’s weather proof, rock solid and cost 15 bucks, that’s been connected to my porch light for years and made it z-wave.
You simply place a Fibaro relay between the motion sensor and the light. Now every time it trips I get a notification, and I use it for many other scenarios also.
Plus it runs on 220v so I don’t have to worry about batteries.
