Kennen Ult goes on CD, but it doesnt show for him [GAMEPLAY]

If Kennen starts his Ult, but dies before it visually appears (you can hear the ult popping), then it will go on CD, HOWEVER, it is shown as ready for him. Other Players can see his Ult as "not ready" via the green circle above his Portrait.

This happens every time. I use the Swamp Master skill.