So, a problem I've had with a team member, it was at my very first job we've ever had in high school at Freddy's Frozen Custard State Burgers. I was brand new first day, and there was a girl I went to school with, never knew I went to school with her, but she was just being mean and rude, and even in front of customers, and it was my first day, I didn't know what I was doing. So I went to the back, pulled our supervisor to the side, I let him know what was going on, he came to the front and addressed the situation in front of both of us, and shortly after that, she came to me, let me know she's been having a bad day and whatnot, and she apologized, and after that, and ever since then, as long as I was at that job, we didn't have any other issues, we were cool, cordial, no issues whatsoever.