Under these conditions the 125Amp breaker has tripped twice. my first question why would the 125A trip? worn out/Tired breaker?
A 200A frame breaker is tested, by UL, for more than 100 operations, so it is extremely improbable that it is 'worn out'. Poor terminations/connections causing excess heating is a more likely issue.
Did the breaker trip under the same conditions:
Time of day?
Temperature in room?
Same loads turning on/off?
