Linear WD500Z-1 does not report on/off state

My Linear dimmer, does not report on/off state any longer. But it reports dimming state properly. So when light is off, state in application is “on” with 0% dim, when light is on, state - “on” with 99% dim. I’ve tied to remove dimmer from the network and add it back . When added at first dimmer state is reflected correctly. But after only dimmer level updates.