Random disconnects

These have been pretty strong lately. It's not even the fact that I dc, that's the least of the issue. It's when I dc and I completely cannot reconnect to the match at all, that's what gets me. I get low priority queue for it too because the game assumes I "left". Does anybody actually know how I can stop this from happening, because I know if I ask riot to lift my low priority rather than waiting 20 minutes for five games they will not do anything to help me.