It's hard to imagine that in any job, anybody would not come across an issue with a team member. I have, over the course of my career, run into many such issues, but I've always been the type who likes to solve problems at the lowest level possible. I don't like to go over anybody's head or anything. I feel like that just causes more problems. So in my mind, bringing that issue to the person and trying to resolve it with them in a non-confrontational way, as much as possible, is the best way to handle things. And then of course, if we can't, then it needs to be elevated for somebody else to help with.