Z-wave range of only centimeters

[UglyDuckling2k]

I have the same experience. As I wrote here before the thread was locked.

Random z-wave behavior

I have just installed a Homey together with 6 Telldus Mini Plug-in switches. But I have some issues that makes the entire setup wothless. After some trial and error I figured out that the switches had to be 'centimeters" from the controller for the pairing to work. But when everything finally was paired and placed I cannot get the switches to work consistenly. For example, when I run a flow to turn on the six switches it sometimes works, but mostly one or two random switches never toggle. My…

As a beginner in z-wave I don’t know if it it’s the standard that’s this bad, or if it’s the Homey? Should I return the Homey and try a controller from another manufacturer?