I can say some zigbee plugs have terrible/problematic antennas.
I had a situation where:
Plug A <------> Plug B <-> Plug C, where B would have connetion issues but
Plug A <------> Plug C <-> Plug B would be solid
It maybe be that my selected zigbee band is not optimal for every device I use. That could also effect the range/signal strength
I can say some zigbee plugs have terrible/problematic antennas. I had a situation where: Plug A <------> Plug B <-> Plug C, where B would have connetion issues but Plug A <------> Plug C <-> Plug B would be solid
It maybe be that my selected zigbee band is not optimal for every device I use. That could also effect the range/signal strength