Z-wave plug stopped working


I’ve been using three Z-wave powerplugs on my second floor for over a year now. But somehow one of these plugs stopped working in that location. I can use the plug fine when I move it 1 meter away for instance. That location also won’t work when I place a completely new z-wave powerplug there.

I have no idea why, cause nothing changed over there or in my house that could cause a disturbance as far as I can tell…

Is there anything I can do?

Add another mains powered zwave device in between. In my opinion the simplest ‘fix’.