Sand's curse not dispelled by accursed's shield

[Korish]

Why does Accursed's shield not dispel Sand's curse? It is supposed to dispel debuffs as far as i know. I mean it works on keepers ult, why not sands curse?

Last game I played i tried to dispel it and the path of sand disappeared for a couple hundred units and came back?

[Vahn]

It does dispel the debuff, but it will be instantly reapplied if the unit is still on the sand path.

[ElementUser]

If the hero is on the sand trail, it will instantly reapply since the sand trail applies the state every frame.

If Desert's Curse is actually targeted onto that hero, then it will continue spawning sand for 8 seconds, so the sand will still be below that targeted hero's location which causes the slow like my first point.

The sand trail spawning mechanism is an affector that spawns a gadget, so removing the debuff does not affect sand spawning at all.

[Korish]

Ahh i figured the sand spawning was part of the debuff and would be dispelled :(

[Marach]

I think the same would happen with deadwood's Rotten Grasp - it reapplies the grasp every frame. maybe there are more skills that function like that and that are practically unpurgable by accursed's Fire Shield, but I can't think of any now.