When u have afk player in ranked.

I play ranked all day long and I have same problem someone go afk after 5th minute we cant remake and we must wait 10 minutes to finish and we lose lp,I think RIOT should make something to prevent losing lp if someone is afk more than 5 minutes bcz chance to win a game without 1 player is low.Give ur oppinion or what they should do.
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