Mouse Cursor movement issue

Hey guys, so everytime i play a match in league i find it hard to move my cursor around, when it comes to navigating the screen or moving from point A to point B, i cant move my cursor around my screen smoothly, it either stops moving for a bit at some point. Its a very frustrating issue. My mouse works fine on any other game or on the pc itself but after league game client loads and im in game, thats where it starts and u cant move my cursor around the screen as normal.Sometimes as im walking towards an engage,i try controlling my champ as i auto path towards the enemy and my cursor stops moving at a certain point for a little while, please help