Autoattacks wont work after last patch

So after the last patch sometimes autos wont work, i click like a maniac ono a champ and it jsut does not work, i checked everything and it works then it doesnt, for no reason. there are moments when you just die dont get the kill and therfore lose the game because you just suicided and failed... pls help, and again i checked almost anything and i havent changed anything, it just apreared after this patch. any solutions?
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