[GAMEPLAY] I got a leaver 0lp for this?

So I wasn't entirely sure where to put this, but basically when i got to lane, i tabbed out, and when i tried to tab back in my client crashed and it literally didnt allow me to do anything. I was gone roughly 10 minutes. (This being in my eyes, not at all my fault considering the game forced me to patch repeatedly before finally allowing me back in game. The game itself was 50 minutes long. My score ended at 11/6/8 So it wasnt like i was trolling, like i was legitimately trying even being even in gold with their support, so im not really sure why i didnt get lp for it? I contributed a lot to the team, of course i didnt solo carry or anything like that, but i did do really well upon returning and as a result shouldn't be penalized for being gone for maybe 1/5th of the game by something out of my control