Fibaro FGS-213 Power consumption problem

I have a Fibaro FGS-213 ZW5 v3.3 Single Swich 2 connected trough a Aeotec Z-Stick Gen5

If i turn on the light it should show the actual power consumption with the attribute “Electric Meter (Watts)” or “Sensor (Power)”

The Sensor (Power) is the whole time -NaN, there is no update on this value.

The Electric Meter (Watts) show the actual power consumption, 0.8 if the lights are off and 11+ if the lights are on. I planed to use this value to test if every light bulb is working, but the value update is everything but not constant.

If i use Paper UI than there is a 80% chance that i get the right value.
If i use the Classic UI, there is a 50-60% chance.
If i use Habpanel, there is a chance around 50%.
But if i use the Habpanel app on Android, there is just 10-20% chance that the value get updated.

And there is a another possibility by every update too, that not the full value would delivered, but just a part of it, for example just 4-6, where the real consumption is around 11-12.

Where can be the problem? Is a configuration problem? Is a problem by the Fibaro Single Switch 2, by the Aeotec z-stick Gen5 or by the Openhab?

Ty for the answer.

Here some log:
2019-03-26 19:50:33.230 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become ON

2019-03-26 19:50:33.257 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from OFF to ON

2019-03-26 19:50:45.537 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command OFF

2019-03-26 19:50:45.586 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become OFF

2019-03-26 19:50:45.607 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from ON to OFF

2019-03-26 19:53:27.838 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command ON

2019-03-26 19:53:27.848 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become ON

2019-03-26 19:53:27.862 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from OFF to ON

2019-03-26 19:53:29.435 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_ElectricMeterWatts changed from 0.8 to 11.3

2019-03-26 19:53:35.616 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command OFF

2019-03-26 19:53:35.631 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become OFF

2019-03-26 19:53:35.659 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from ON to OFF

2019-03-26 19:53:37.210 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_ElectricMeterWatts changed from 11.3 to 0.8

2019-03-26 19:53:43.153 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command ON

2019-03-26 19:53:43.170 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become ON

2019-03-26 19:53:43.176 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from OFF to ON

2019-03-26 19:53:52.202 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command OFF

2019-03-26 19:53:52.208 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become OFF

2019-03-26 19:53:52.243 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from ON to OFF

2019-03-26 19:59:48.926 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from OFF to ON

2019-03-26 20:00:08.851 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command OFF

2019-03-26 20:00:08.864 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become OFF

2019-03-26 20:00:08.875 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from ON to OFF

2019-03-26 20:00:13.622 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command ON

2019-03-26 20:00:13.634 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become ON

2019-03-26 20:00:13.652 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from OFF to ON

2019-03-26 20:00:22.628 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command OFF

2019-03-26 20:00:22.645 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become OFF

2019-03-26 20:00:22.657 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from ON to OFF

2019-03-26 20:01:04.425 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command ON

2019-03-26 20:01:04.431 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become ON

2019-03-26 20:01:04.446 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from OFF to ON

2019-03-26 20:01:06.013 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_ElectricMeterWatts changed from 0.8 to 11.3

2019-03-26 20:01:10.965 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command OFF

2019-03-26 20:01:10.978 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become OFF

2019-03-26 20:01:10.991 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from ON to OFF

2019-03-26 20:01:12.537 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_ElectricMeterWatts changed from 11.3 to 0.8

2019-03-26 20:01:14.905 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command ON

2019-03-26 20:01:14.915 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become ON

2019-03-26 20:01:14.924 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from OFF to ON

2019-03-26 20:01:20.588 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command OFF

2019-03-26 20:01:20.595 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become OFF

2019-03-26 20:01:20.603 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from ON to OFF

2019-03-26 20:01:25.372 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command ON

2019-03-26 20:01:25.383 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become ON

2019-03-26 20:01:25.400 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from OFF to ON

2019-03-26 20:01:30.102 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command OFF

2019-03-26 20:01:30.112 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become OFF

2019-03-26 20:01:30.126 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from ON to OFF

Example for the not full value transfered:
2019-03-26 20:18:34.632 [ome.event.ItemCommandEvent] - Item ‘Lepcsohazkapcsolo_Kapcsolo’ received command ON

2019-03-26 20:18:34.642 [nt.ItemStatePredictedEvent] - Lepcsohazkapcsolo_Kapcsolo predicted to become ON

2019-03-26 20:18:34.673 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_Kapcsolo changed from OFF to ON

2019-03-26 20:18:36.216 [vent.ItemStateChangedEvent] - Lepcsohazkapcsolo_ElectricMeterWatts changed from 0.8 to 6.9