Lights dim to duration not working (Heat it)

I’m new to Homey, got some basic time of day and movement/presence based lighting and temperature controls going but now I wanted to make the transitions a little smoother and ran into a problem. I was led to believe I could use “duration” on the “dim to” card to make the dimming take place over a period (like 5 mins). I can make lights dim up and down no problem, but when I add the duration feature I get the following error. Do my Heat It Z-Wave dimmers not support gradual dimming maybe? Any suggestions for alternative methods for gradual dimming would also be greatly appreciated. I understand it’s possible with scripts but I’d rather avoid that if I can..

This card has failed after 8ms

An error tag has been generated

Error

util is not defined

With the. Chronograph-app you can create a transition:

This gives you a trigger:

Now you can dim to the transition-value. Each step the transition-value lowers from 1 to 0,5 with 0.5/20 per step.

To help improving stuff: please notify the app developer about your findings. It seems to be a bug / glitch.
Contact info usually is present on the app page at the Homey app store.