There actually already is a github issue. That was the first thing I checked. [MQTT] Dimmer channel on/off properties not sending “ON” or “OFF”. I added a link to my code in the comments. It is literally the first piece of functional java code I’ve written so I didn’t quite feel ready to make a pull request with it.
Now that I already setup the build environment I don’t think I’ll go through the hassle with proxy items. That would turn into a mess quick. Nearly every switch in my house is a dimmer.