Game freezes and I can't exit

Since last update only in team fight tactics the game freezes after a few rounds for no apparent reason. I can't end the same or restart the came using task manager or holding co trol tab. I am forced on the client. My PC is fast and it has nothing to do with my computer. I also have nothing else up. Again it's only on tft since the last update. Please help me.
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Ofensivo Spam Mau comportamento Fórum incorreto