I have a single blue switch on Smartthings to control by rear door led. Dimming stopped working yet the switch LED bar correctly reflected the setting. Not sure what to check so I changed the smart bulb setting to on. The bulb totally ignored the switch and stayed on. Reset back the normal default and dimming now works as it used to. ??
I also use the button for garage door control and the LED bar to indicate various other things so when I leave the house a quick glance to see a green indicator before I go. 