Leaverbuster in bot matches

Hey all people.

I come home pretty late and always play a bot run before dinner since I'm not sure how much time left I got. Sometimes I leave the match for about 10 minutes in order to eat my meal if I can't end the game in time and 80% of the times I come back before it's over. Now, I have about two hours of free time a day I like to spend playing league and I'm being punished by the leaverbuster with more than 1 hour and half of waiting (20 minutes for 5 matches) for something that totally doesn't affect the other players (if a player disconnects, a bot drops out to even things out). I never left a normal/ranked game before it was over and always made sure i could sit through the entire duration of it, I totally approve the penalty system in those environments because a 4/5 match is (most of the times) a lost match. But does anybody else think this system is a "bit" (I'd use another word to describe it but I'm digressing...) too harsh for bot games? Isn't the 20 minutes penalty absurdly high when there's an already implemented system to make sure the match stays balanced? I'm totally fine with losing the ip prize if I leave the game and don't come back in time (let's just face it, unless you're not doing it for the first win of the day, the prize is simply laughable anyway) but considering the little time I already have to play, 20 minutes of waiting are just outrageous.

Let me know what you guys think about this in the comments.