I have a 20 amp type QO GFCI circuit breaker (12 GU wire) that is tripping under load. My home is about 5 years old and the breaker provides power to half of the kitchen outlets and part of the dining room. The breaker just started tripping few weeks ago. We use a air fryer on this circuit and it trips about a minute after it has been on. I tested the amps while on and it reads 12.5 max. I’ve tested a different appliance on the circuit with the same results. Additionally, I tested the air fryer on a different 15 amp circuit, no issues. Do I have a bad breaker? If not, what else could be the issue? Thank you!