I have big delay for no reason (network is fine )

Hi guys i want to tell you what happens on my every game i started...I need so much help!!! Every time i start a game in 5-10 min starts to have big delay on my spells i can walk and auto attack like normal but i have only delay on spells and if i didn't restart the game and reconnect again is not getting better.. I uninstall the game and install again and nothings get changed so i want your help guys...PLEASE