The manual is freely available online but is silent about how to cancel the delay. You could try these:
Pressing the delay button increments the delay from 1 to 19 hours. Possibly you press repeatedly and it ramps up to 19 hours then cycles round to 0
Possibly press and hold for 3 or 4 seconds might cancel that program element.
Alternatively, contact the manufacturers help desk, pointing out that the manual is silent on that point
Edckfkfj, November 2024