Any time a pedestal breaker trios, I check both ends of my power cord and the breaker for heat. Hold you hand near each one to see if it is running hot. That is a sign of a bad connection at that point.
I actually use a handheld IR thermometer, since I carry it to check tire temperatures at each stop.
2019 Coachmen Freedom Express 192RBS
2015 T12RBST Flagstaff Hardside
Disclaimer: The actual value of my "Two Cents" of advice varies just like a bitcoin.