Ekko lagging terribly during ult everytime i ult and im not the only one

Every time I and the enemy ekko ulted we would lag the entire way back to our 'ghost' and we would lag thru the dragon walls and other walls and right by enemies. the champ would turn around and not flash back to where he should be, but lag step by step all the way back and it took a max of 5 seconds before the ult would finish before being able to do anything else. this isnt a computer problem its not an fps drop, i could do his combos and everything else up to the point of ulting. at which point i and the enemy ekko literally became a stationary target at our ghosts location while we slowly lagged our way back to that very location. example: I would pop my ult and ekko would technically teleport back to his ghost, meanwhile it would show on my screen ekko turns around a runs/laggs his way back to his ghost and while this is happening im getting attacked by everything. and in most cases died. lol and through out the whole ordeal im unable to cast spells or summ spells. and ekko even appears to travel downs paths i never even took. for instance i ran down mid river to dragon and ultd out of the pit when the enemies ganked and it took me thru the bottom lane tri bush and to the other side of the dragon pit then after all the lag was done i appeared back in the middle of the river and was dead. ik this isnt a problem with lagging but this has to be a problem with ekko... =(