I am trying to operate the device with a feller switch without success. If I switch the switch on once, it is recognised in the Hue app, but if I then switch the switch off again, it is not recognised. All other switches are not recognised either. The module works when I connect the wires manually. And when I test the connection from the switch with the multimeter it is connected once, then not. Does anyone have an idea what the problem could be?