The breaker for the pump trips when the washer fills. Washer repair person said it is not the washer and pump repair person said the pump is working correctly. Breaker does not trip every time. Could it be a bad breaker?

Could be , or just a loose connection at the breaker, which causes heat that trips the breaker prematurely. Replacing the breaker and checking both line and load connections would be a good first start.

I took your advise and changed out the breaker and now just waiting to see if that fixed the problem. Thank you so much