Stuck in loading screen while the game goes on without me knowing

Hey guys, I've had this problem a few times, where I get into game, lobby goes fine, pick my champ, get into loading screen. Then I wait, the wheel at the bottom right is turning just fine, so no problem. Loading screen is a little long, but the tool Riot implemented means I'm loading, shouldn't be a problem. Then game starts, time displayed : 3:09. Remake is voted, and Defeat shows up on screen. Leaver Buster because it's not the first time this has happened. It's just so stupid and frustrating. I have no idea there's a problem, it happens randomly, generally after I take a break from playing, or turning on my PC. So there's nothing for me to do but wait and hope this time it won't crash. Please give me some way to fix it, or fix your own code, because this is just the worst gaming experience in a while.
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