Not gaining lp if you aren't in game for when the game ends.

I personally think this is a really stupid thing that exists in this game. I just played like a 40 minute game and my windows force restarted my computer and we won when I wasnt in game, and now Im missing out on like 20 lp because of this. I get the idea of it, its to prevent afkers and trolls but I think there should be some kind of implementation where the game can recognize if you played 30+ minutes of the game that you get lp anyways even if you aren't there for when the game ends. I essentially wasted 40 minutes of my life, just only improving mechanical skill, if I wanted to do that, I'd just play norms.