If a teamate is banned for inting you should get Loss Prevention

So just lost a game where we had a zed who fed, myself and duo reported him for inting as he said in game "I go troll now". We all reported him and we got an instant feedback report. This particular players match history was full of 0/14 nunu games. Surely the game that we just had with him should be loss prevented? I know loss prevention isn't implemented in other ways as it can be abused but surely not in these circumstances
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