The Spellbook ability removed, but the effect doesn't instantly removed

[A-SM]

Well, I think the title says it all. Here's my trigger:

• Trigger
  • Events
    • Unit - A unit Acquires an item
  • Conditions
    • (Item-type of (Item being manipulated)) Equal to Orb of Darkness
  • Actions
    • Player Group - Pick every player in (Player group((Owner of (Triggering unit)))) and do (Player - Disable Arthas Spellbook for (Picked player))
    • Unit - Add Arthas Spellbook to (Triggering unit)
    • Wait until (((Triggering unit) has an item of type Orb of Darkness) Equal to False), checking every 0.10 seconds
    • Unit - Remove Arthas Spellbook from (Triggering unit)

When my unit gets the item, the ability from the spellbook activated instantly, but when my unit drop the item. There's always an interval for about 2-3 seconds before the ability from the spellbook is removed. What causing this interval to happens? Thanks .

 

[keychup]

Just add the Arthas Spellbook ability to the item instead. The spellbook will still appear on your command card when you pick the spell book up.

 

[A-SM]

Its true that if I placed the ability in the item, the effects will instantly gone if we drop the item. I wanted the spellbook problem gone, but hearing from you that the spellbook takes place in command card, seems I have to find another way. Thank you keychup