getHighestBlockAt() is returning air

Code:

if (event.getEntity().getType().equals(EntityType.SQUID)){
            Block block = event.getEntity().getWorld().getHighestBlockAt(event.getLocation());
            System.out.println(block.getType());

the above code is within an event handler for creatureSpawnEvent. Every time I test this code, it outputs AIR to the console. the definition of getHighestBlockAt() is that it returns the hightest non-air block at a given location, so this has me a little stumped. Any thoughts/suggestions? Thank you!

 

Maybe it isn't finding any blocks at all, and it decides to return air. Try running the code on a fixed location, that you know for sure should return something else.

 

Code:

@EventHandler
    public void onPlayerInteract(PlayerInteractEvent event){
        Location location = event.getClickedBlock().getLocation();
        Block block = event.getPlayer().getWorld().getHighestBlockAt(location);
        System.out.println(block.getType());
    }

this code prints AIR every time, too. now i'm really, really confused.

as far as the squid code goes, if I spawn the squid into a block like snow or a sign, it prints SNOW or WALL_SIGN. however, if I do it in water it still prints AIR.