Installed an HS200 for some outdoor lights. Single pole - two sets of black/neutral/ground wires, so I have the two black wired to the two kasa switch blacks. The two neutrals are connecting to the single kasa neutral. Two ground connected to the kasa ground.

No issues with installation - but when I turn the switch on, the lights come on for a few seconds, then will turn off. The switch will still say it's on.

I checked the wire connections and they seem to be fine. Any ideas?