Criticize someone in front of the group and they’ll remember the audience, not the advice.

Public correction comes with a witness list, and the witnesses are what the person remembers. Whatever useful thing you said gets buried under the experience of being embarrassed in front of people whose opinion they care about. Even accurate feedback fails with an audience, because now they have to defend their standing as well as consider your point.

Save it for the walk to the car or a message afterward. Same words, no crowd. And if you notice yourself wanting the group to hear it, that is worth being honest with yourself about.