bug with the sellecting of a role !

Hello RIOT , I have played LOL for a long time - maybe around 3 or 4 years I love the game but i have a problem, maybe the problem is only in my acc or game i can not be sure, but it is driving me crazy ! Every i log in to my game I press play , then the new screen with "Chose a role" show up. And all the roles work just fine, with the exeption of one - "fill" i have tried 35 time ( not kidding) in a row and every time i press "fill" is like i have press "support" - so it is not working and it was tested ! But I know how you can fix it ! Just make players who play with fill win some extra bonus of something, it is not in the matter of what, just gave them bonuses - To press fill is a risk, you don't know what you will playing so the biggers the risk the better the reword !