[GAMEPLAY] Lux E - Bug?

Just played a game of Lux on ARAM and noticed an odd interaction between dying and popping the E within a few frames of each other. Not sure if it was literally a frame perfect bug where Lux is given the lag compensation to say "You popped your E" while the enemy sees me die first resulting in "You killed Lux before she popped E" And suddenly there is this weird interaction where I see the E pop but they don't. I brought it up and many of them said I never popped it or that it was still on the ground afterwards. However, I clearly saw the E animation pop, and the replay backs up my story. The damage clearly didn't go off. Not sure if this will necessarily destroy someones game, however it was an odd bug that seems like it would be reproducible albeit very difficult.

I've attached a Youtube clip displaying the bug.