Understood! I will be requesting Tesla to send out an electrician to look at this since it's all their work in the load center.(I am not an electrician. IIf the pink and purple wire share a neutral, then that would make them a multi wire branch circuit, and I believe that the newer codes require that the poles be connected. Nevertheless, if it is 12ga, and the wire goes only to the microwave (I.e. the microwave circuit doesn't have a piece of 14ga wire somewhere else), then the breaker for that circuit might be upgradable to 20A. (However the other circuit also has to be all 12ga as well!)
If it were me, I would have an electrician out to look at it, and ask if the circuits could be upgraded to 20A to reduce nuisance trips. From what you have shared, I would be thinking about mis-wiring issues or a bad breaker, but that's just me.
All the best,
BG
I just don't like signing the SVA for potential $200 charge if they come up with BS reasons and say it's not their fault...