Will trigger work for manually sent mqtt sensor data?

I created a temperature sensor using manually sent by mqtt.fx msg. I see changing values in ui after sending msgs. But I cannot run a trigger which I created for the temperature sensor value change.
What am I doing wrong? Is it possible to run trigger manually for testing purposs?

As far as I know you cannot run triggers manually. There is currently a bug with triggers. if you delete a widget you can’t run a trigger on that channel any more. The work around is to use a different channel or delete the device and create a new one.