Background

I recently tendered my resignation and am currently serving my notice period, with my last working day being 1st September. I made this decision due to ongoing uncertainty and instability within the organization and have since accepted an external opportunity.
Throughout my time here, my performance has been consistently strong and my KPIs have been rated positively, and I was even rated above average in one cycle. There have been no major issues during my tenure.

The Issue

A few days ago, I had an uncomfortable experience that caught me off guard. After completing a task, my line manager unexpectedly created a Microsoft Teams group chat including myself and the new joiner who’s taking over my responsibilities. She then sent a series of messages in that group, questioning how certain figures were derived, asking for supporting documents, and demanding explanations.
This approach felt abrupt and out of the ordinary and it’s not how such matters were handled previously. I couldn’t help but feel disrespected and somewhat publicly shamed in front of the new joiner. The incident has been bothering me since.

What I’m Considering

I’ve been thinking about having a one-on-one conversation with my manager to express how her actions made me feel disrespected and unfairly put on the spot. At the same time, a few friends have advised me to let it go, given that I’m leaving soon and there’s no point creating further tension.
I’m conflicted. While part of me wants closure and to stand up for myself, another part wonders if it’s best to just move forward without stirring the waters. The incident did leave me disturbed, and I’m still deciding what the best course of action would be.

Any advise? Suck it up or address it professionally?