Why is Screen Dim at Home profile not working?

[Pinmac1]

I have what I thought would be a fairly simple profile where, when connected to certain wifis (home, work) the screen is set to zero brightness to save brightness to save battery with an exit task of Auto Brightness On. It doesn't work. Can anyone think of any reason why please?

 

[XplosiV]

If your using the auto brightness on in the task it will just go by the light sensor on the phone.

Try this in your task +Display / Display brightness/ set slider to 0 (the scale is 0-255, 255 being 100%, 51 being 20% etc) /tick disable safeguard