Comment by jjk166

Handling negative feedback doesn't involve going to anybody - neither the manager, nor the person who gave the PR. Someone giving negative feedback is not supposed to be a conflict in need of resolution. We are talking about a situation where there is a conflict that needs to be resolved, ie that it has already become hostile.

If they are going to their manager, and then the manager, rather than convincing them that they are over-reacting, is instead going to you and telling you that there's something wrong with the feedback you gave, you should handle that negative feedback.