I have one of these on my garage door and believe @ogiewon does too. I got mine with my first ST hub. My batteries have lasted over 1.5 years every time I change them. I would suggest resetting the device and then enable Zigbee pairing and it will fall back into place. Follow @Navat604’s instructions on resetting:
You might click configure after pairing again too. I have a newer ST multisensor that would report active constantly after changing the coin battery and it would stop after configure.
