Now that the leash itself is bound to the debuff, you broke the ability's refresher interaction.

As I had said before, if you make this change, make sure you also make the debuff stack with each cast. Because now, you cannot stack dream coils anymore, which severely hurts Puck's Refresher Orb synergy.

Before the change, you could have 2 leashes on an enemy, both working independently. Each leash would break separately. But now, when one leash breaks, all other leashes disappear with it, which is bad.

As you can see in this vid, each cast creates its own link, but they share the same modifier on the target. As soon as one link breaks, the other link disappears as well. This did not happen before the recent fix to its status resistance interaction. Each link would work independent from each other.