Skarner's Impale during Jarvan's Cataclysm Bug

When Jarvan gets ulted by Skarner DURING his Cataclysm animation (before damage is dealt), the damage still goes through to Jarvan's target after the duration of Skarner's ult regardless of Jarvan's distance from his target.

I'm not sure whether it is regardless of the distance he is from after Impale's duration but I do know it is well beyond Jarvan's ult range and Impale already interrupted Cataclysm so I don't see how the damage still continues after.

I have not been able to replicate this bug personally, however. I would've been able to with maybe sandbox, since I do not have enough willing friends or enough computers to replicate this in a custom game.