Proof by example? I don't believe there is any claim that it doesn't work in general, but three of us have now reported cases where a leak sensor going wet does not result in HSM actions even though that same sensor is configured in HSM, water is armed, and actions are configured. In my observations, the sensor going wet did trigger an RM rule, so we know Hubitat saw it.
I was able to repro this and described what I was seeing in this post. But it wasn't worth pushing on as I could do what I wanted to do in RM instead of HSM.
