@indivic, @tpope FWIW, I’m seeing very similar behavior and problems on a black series dimmer using an identical no neutral, AUX switch setup. I have a partial work around implemented but cross posting for the benefit on any others having similar issues. I ended up having to configure LZW31 for a neutral setup and set stops on the dimmer brightness to get things to work.
I have an open thread with support but full description and pics are here: