Olaf Ult Bug

Hey rito, I have been playing olaf for a couple ofo games but last game I was agianst a nautilus and a vi, Everytime the vi ulted me I would react by pressing r to have a cleanse effect on the ult, but i actually got the quite opposite, I would go even higher in the air and it would take longer for me to land and be able to move. This may also have to do with the fact that nautilus might have q'd everytime I was in the vi ult. Please look in to this. Thank you, Armoured BaNaNa