No, I don’t have any multi gang switches/lights.
I’ve looked a bit more at the protocol and I think I know what’s going on, but it’s hard for me to test without any switches of my own. If you could provide the relevant lines from your home-assistant.log file I can have a go at fixing.
You’ll need the latest version of the custom component that I’ve just pushed to github, and you’ll need to set the logging level for the lightwave2 component to debug (add the following lines to your configuration.yaml):
I only need the log output up (and including) the section where has the lines “Adding device”