Low LP gains after 9.3 update

Hi, it seems that after the 9.3 patch LP gains have been ruined. i get about 23lp a win normally (9.2 patch played just before server went down) but now im getting 18lp a win on 9.3 and same as my team mates. I have asked some friends on my friend list and they seem to be having the same issue. this cant be right? whats going on rito?
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