Random disconnection

Recently I’ve noticed that I get randomly disconnected from the game... I’ve checked that it’s not my internet connection’s problem because I’ve opened up a few webpages on the same computer while my league got disconnected. And I’ve discussed it with a few of my friends from several parts of NA region. Numerous of them was telling me they got disconnected every other game.. and one of them told me he was in promos while this happened. And was placed into low priority because of this issue. Is there anyway we can fix it?