Remove Falling Block Mid-Air?

I am making a plugin for one of my friends that involves falling blocks ontop of mobs and when the mob becomes too far away I want to remove the mob AND the falling block, what happens is the mob get removed fine but the falling block falls to the ground AND THEN dissapears. Can I make the block dissapear as soon as it falls? Could it cause problems as it is a falling block on the mobs head?

Code:java

 
     @EventHandler
     public void onEntityChangeBlockEvent(EntityChangeBlockEvent event) {
         if (event.getEntityType() == EntityType.FALLING_BLOCK) {
             FallingBlock fallingBlock = (FallingBlock) event.getEntity();
             if (fallingBlock.getMaterial() == Material.WOOL) {
              event.setCancelled(true);
         }
         }
     }
 

What I have checks for when the block lands

 

Just remove the fallingblock entity when you remove the mob.