Volibeat Q bug

I was playing volibear jungle recently and i encountered a bug where you use E on krugs and then a later 1 second follow up with Q it won't flip the big krug, and the big krug still does damage to you, i encountered that bug more than 3 times while playing volibear jungle, and last time i tried it on costum mode to see if i am mistaken, but still the bug is there. once i even my passive as volibear activated because the big krug won't flip and die. this is on patch 5.13, i don't know it is going to stay at 5.14. please riot investigate. i can't record video because i don't have recording software, but i will try soon to find one and record the bug.