Is the "Most played Champion" in your profile broken?

Hello, ever since S6 I currently have Fiddlesticks as my most played champion. My friend played it a few times last season when he used my computer and it's now stuck there forever. I have no ranked matches only Normals and I play mostly Poppy and Elise and still I always have Fiddlesticks in my profile. Is this a bug? or is there a way to change this?