Wall Display: Temperature change does not (reliably) fire action

  • I installed an action (Only when the temperature changes) that hits an URL with the parameter $temperature.

    The event is triggered randomly but not at every temperature change (Temperature Delta Threshold is set to 0.5).

    The equivalent humidity action (parameter $humidity) fires reliably.

    My Wall Display works as a thermostat and uses an external BLU HT sensor.

    Any ideas?