Thankfully, I've never experienced a problem with a team member. If I ever needed to, though, depending on its severity, like if it was something really minor, I might talk to the team member about it and see if that could be resolved. If it was more major than that or something where maybe I didn't feel comfortable talking to them, I would then be reaching out to my manager and letting them know, like, what happened, asking them what the best next steps are, and that's what I would do.