Odd gold riot square appeared after defeat screen showed up

http://m.imgur.com/account/Dabmasta710/images/7cugFS3 Was in a flex que game with some friends and and at the end of the game this spinning/rotating gold square with the riot fist on every side was just chilling in the corner of the screen. Never seen it before nor been ableto find anything online about it. Also took a picture with my phone but cant post it sad day.