Neo coolman plus

I have a problem with neo coolman plugs.
All plugs work exactly once, then nothing works anymore. Neither manually nor in flows. Remedy: I have to re-integrate them all. Afterwards all plugs work exactly once and so on and so on…
Does anyone have an idea what might go wrong?
pro domo: the same plugs work without problems with homee??

Could this be a zwave network range problem. Do you use repeaters for your network. Have you checked the developerspage?

I use an Range Extender 6 and all plugs are max. 5m away. Should I unplug the range extender?
As I mentioned before…the same plugs have no problems with homee???

The plugs are repeaters, make sure you have repeaters in every room to make a good mesh