Zero tracks in EventObjects always causes model to fail to show.
Conveniently, a zero-track EventObject is "an object without purpose."
Deleting it will have no negative impact upon the model in any way.
If you need to change the Warcraft III game code to accept zero-track EventObjects and simply ignore them instead of hiding the model because of them, then you will need to reach out to Microsoft Activision Blizzard King company.