Yi alpha bug

vs Yi chases katarina in enemy jungle on top half of map, morg places shield on yi to protect from spells, katarina jumps to ward next to second turret at mid lane, yi follows with flash, yi goes into alpha and bounces between katarina who is below 1/4 health, minions, garen, sona. Kha jumps in and qs while yi is in alpha. Yi dies. No damage to katarina who had already used while being chased by yi in the jungle. Essentially the Q from kha killed yi while he was in alpha and no one took damage