[GAMEPLAY] Nautilus ult on Zed who then enters Death Mark causes shenanigans.

As Nautilus, I used my ultimate (Depth Charge) on Zed. Before my ult could reach him, he entered Death Mark on my ally, becoming invisible. After returning to the map, the indicator for Depth Charge remained visible on Zed for several seconds, though nothing happened. According to the Zed player, the indicator was not visible for him after returning from Death Mark. Video of admittedly poor quality provided.

Should Depth Charge still target Zed after he returns from Death Mark, or is this simply a visual bug?

Thanks.