[CLIENT] Masteries in other Summoner's profile

While looking at masteries on someone on my friendlist and searching for a match (unranked draft), after entering the champ select room, i had his masteries list instead of mine. When I tried to click on one of them, the error said something like "no suitable error found" (can't quite remember). The "fix" is clicking on the edit button, you then get your pages back and can select them.