Masteries bug in Teambuilder

so I just found this on accident. i was in teambuilder and decided to look through my friends masteries. i came back to the queue and for some reason all of his masteries were in place of mine. Steps to recreate: 1 Get into Join a Lobby in teambuilder 2 Select your champion and your role 3 Go to your friends list, right click any name and view their profile 4 go to their masteries and click on atleast 1. 5 return to teambuilder and you should have their mastries in place of yours, or you will have a few of their masteries mixed in with yours. Either way the one that you clicked on last from your friends list will show up as your selected mastery page

i tried it this multiple times and it worked every time. Leaving the Teambuilder setup page seems to fix it

i dont know if this effects anything ingame but id rather not try

EDIT: also if you try this bug do not click the masteries edit button. you may be unable to get the edit page off your screen

EDIT 2: For some reason this bug is really fun for me to do