[CLIENT] Masteries Changing In Lobby

So I was playing team builder with my friend and went to check his masteries because he asked me how he should be building them (I told him just to build how he likes but to focus on what's useful for his specific role for those who are interested) and when I came back to the lobby my masteries were, at least by name, changed to his. I reversed it by going to my masteries page and coming back to the lobby again. I didn't want to risk going into a game with the mastery names changed so I don't know if it fully changes them or not. If I changed my masteries to a different one while the glitch was up I got a message saying a suitable error message could not be found and then the name would change to whatever mastery I was picking. Would love for a red to see this and maybe say something about it. I don't have a picture, never really been good at taking screen shots, but if someone would like to replicate this and post one I would be thankful.