Lonsonho QS-Zigbee-C03 - no response to zigbee commands

Hi,

I have the latest HA (all updated) and today I tried to connect the curtain module Lonsonho QS-Zigbee-C03. It worked fine on the table. It also works fine outside the wall socket. It responds to the commands, switches, etc. I just pushed it into the wall behind the switches – zigbee seems to be dead. It still responds to manual switches installed over it but all zigbee commands time out.

Distance to the zigbee router is around 3m / 10ft (one additional wall in-between - building construction is concrete). Could it be that the range is really so bad for this device? It is practically useless if this is all I’m going to get. I have some other curtains much further which I haven’t even tried to install.

Any ideas? Comments? Suggestions?

Thanks