Sonoff TRVZB - Auto vs Heat

I have deployed a couple of Sonoff TRVZB devices and im using the scheduler card to define a heating pattern similar to how my TADO setup is done i.e. at 4pm set to auto temp 19 degrees.

The temperate set point appears to be set correctly but then the valve isnt opening to call for heat if the temperature is below the set point.

TADO on auto appears to work this way but the sonoffs need to be moved to HEAT mode for anything to work.

Just wondering is this something with my setup or is this the same as others.

Thanks