Does the LED turn on/off as you toggle the dumb switch? It seems that the toggle may switch may be toggling the power to the Invovelli? If that’s this case, it may be a wiring issue. Are you confident the wiring is correct?
You can also try resetting the 21 and 22 parameters even though you have them set correctly. Change each at the switch to an incorrect parameter and save. Then put them back to the proper settings.
And there have been reports that using an Aux instead of a dumb switch resolved issues.