League Client Lagging????

My league client lags so bad that I can barely ban a champ in time and choosing a champ and changing runes is a literal gamble and I often go into games accepting the fact that I cant change runes in tiume so I don't bother. is anyone else having these issues, its nothing to do with my pc because its new and high spec and everything else works fine? any suggestions are appreciated, cheers{{summoner:3}}
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