I am having issues with slave lights not being in sync with master lights. I am using the related tag, but when I turn off as an example Basement_Light_Master in OpenHAB the slave stays on.
Dimmer Basement_Light_Master "Basement Lights [%s %%]" (Lights) {insteonplm="24.AF.2B:F00.00.01#dimmer,related=24.8A.3B"}
Dimmer Basement_Light_Slave {insteonplm="24.8A.3B:F00.00.01#dimmer,related=24.AF.2B"}