I have been struggling to make a flow that turn off all lights that are on in the house. I have a Hue smart button where I created a flow when the button is being held then turn all lights off. But is doesn’t do anything. I I just click the button it turn on the entrance where it is placed and once again it turns off the entrance.
Does it work when you use the test button in the flow? You should see a green check on the command and the lights go out, but you could also see a red error sign, which can show an error message when you click it. If there are condiotions that are not met, you could see that too, and the lights command would then get no other icon at all.
And did you try to put in a notification to see if the trigger works? That is also a well proven method to debug flows.
Just tested with my Hue Button and no problem.
Long press turns off all lights.
All my lights and Button are connected via Hue Bridge and Homey Hue app.
I did choose in Philips Hue app the option to configure Button in other app. The other app is Homey in this case.