See this thread:

https://groups.google.com/forum/m/#!topic/openzwave/QhH6rtiyyaA

It involves that fibaro wallplugs give wrong status.

I don't use the power usage function (only led lamps behind it)

Thanks for the quick reply @trekker25. So after reading through all the links you referenced ...

was to hasty on this:
- my full openzwave config got f*cked up after doing to much node resets

- tonight restorted a month old domoticz folder / hard resetted the zwave controller and added all wallplugs again.

At 23:20 my lights out scene was activated --> all lights went out, but 1 light kept ...