I doubt a soul lives who was perfectly understood in childhood and harbors no residual feelings. Our "imperfections" don't mean a real affront didn't happen. I think it a therapist's role to put extra effort into respect and apologies for injuries.

Your therapist's good track record makes a decision more difficult. If this exchange was atypical, perhaps she was having a particularly distracted day. But it's her job to recognize this and make amends.

I think clients owe therapists nothing more than payment and lawfulness. A therapist blaming the client for reacting to her rudeness is gaslighting.

Wishing you the best outcome, peace and clarity.