Kennen Mastery Editing Client Crash

Two times now when I lock in Kennen in the champion select screen before a match starts, if I try to click the pencil icon to edit my mastery pages the client crashes, but doesn't count it as me leaving the lobby. I am able to change my mastery page to a pre-made on, but if I specifically click on the pencil icon, AND I had Kennen locked in, then the pre-game lobby client crashes on me. Only happens on kennen, and has happened to me twice now in the past two weeks.