I just found out that OpenHab does not get data from my z-wave devices. If I turn on my Fibaro Dimmer 2, by clicking the switch on the wall, the status in OpenHab stays Off even though the light is on. But I can control the switch from Openhab.
I also have some z-wave wall plugs, and they have the same issue. Furthermore I dont get any data about Power usage etc.
If I control my Hue lights through the Hue app, OpenHab will update as expected.