Stuck in place?

I was playing a ranked game as Kalista bot when I looked in our jungle and I saw our top lane Darius running in place (by blue buff on purple side) At first, I blew it off as Darius just messing around and doing it on purpose. In the late game I was running through our jungle getting away from their mid laner (ahri if i remember right). All of a sudden I couldnt not run anywhere. It was like I was caught on something. I couldnt run foward or back. Me being caught by this thing that caught Darius I died and almost lost the game.

Normally I would just laugh as this but this bug could be hazardous to games. let me know if this has happened to anybody else.

Thank you, concerned ADC