it looks like there is an error in dimmer handler.
If you switch on the light over the knx bus (room switch) with the On group address and after that off with the same knx group address the off status is not handled and in the home app the light is still shows as on.
Thanks for fixing that. I've seen over Christmas that I had several dimmers still set to "ON" but with "0% Brightness" I'll test if that also fixes that.
it looks like there is an error in dimmer handler. If you switch on the light over the knx bus (room switch) with the On group address and after that off with the same knx group address the off status is not handled and in the home app the light is still shows as on.