Tripping breaker on high setting if not used for few hours

Hey there,

I have a microwave which keeps tripping the breaker if run on high setting after long time (4 hours) of no use.

If I run it first on low and then raise it's power from lowest to the highest it works normally. So every time I need to use it, I have first to run it on low for few seconds (10) then (low +1) for another few seconds and so on until I reach the power I want to use.

My initial guess is to be a bad capacitor, but excuse my computer engineering background if that is wrong 😑