LOL breaks my internet

I have tested this several times now by playing other games, giving it time, trying to play games at different times but my internet just stops working at a random point during my league games. ONLY my league games the past 4 I have played to be exact. Every single time after I task manager close league my internet begins working again. It has not happened more than once in a game but holy moly roly poly it has tilted me.