Breville Smart Oven Air Fryer Pro Temperature

Hello, I have the Breville Smart Oven Air Fryer Pro. I have noticed there is a 20 Fahrenheit/ 10 Celsius degree difference between the temperature in the display screen and internal temp using a thermometer.

How accurate is this oven, is it normal? I bought it less then a year ago so I can still claim the warrant.

Has anyone done a warranty claim, what is their experience?