[CLIENT] Team Builder mastery pages glitch when viewing other profiles

Upon being matched with a team in Team Builder, and prior to matchmaking, viewing other summoner's mastery pages on their profiles causes my own mastery page selections in Team Builder to be replaced by those of the profile I was viewing last.

Step by step:

1. Select a champion and look for a match in Team Builder.
2. Upon finding a group, navigate to another summoner's profile (either through friends list or summoner name search)
3. Browse their mastery pages. Upon returning to Team Builder, you will find that the mastery page dropdown list shows the other summoner's mastery pages rather than your own.