Invisible Recall Glitch/Bug?

Has anyone on EUW had the invisible Recall Bug?

You see an enemy champion begin their recall animation on screen and the recall sound goes off. Then if they go into the fog of war and come back on the screen. The recall has not completed channeling, the sound is still going for a channeled recall but. The champion is completely invisible and cannot be targeted by abilties

To replicate it to see if it is a glitch

Have an enemy champion begin their recall. Walk away till they go off screen. Then go back within the recall timer. The recall sound will still be going but the enemy champion is invisible.