Modding Help Custom Critter won't fly away if I edit the "collisionpoly".

So I made a custom Critter that is 1005 functional, until I edit the "collisionpolly" to make it sitting in the ground.

The current setting I have is this.

Code:

"collisionPoly" : [ [-0.5, 0.2], [0.5, 0.2], [0.5, 1.2], [-0.5, 1.2] ],

But this makes the critter unable to detect the player and fly away for some odd reason.
But if I set it to

Code:

"collisionPoly" : [ [-0.5, 0.0], [0.5, 0.0], [0.5, 1.2], [-0.5, 1.2] ],

It's COMPLETELY fine and flies away whenever I get near it.
But the problem then is it isn't buried in the ground like I want and it looks weird.

If anyone could help me figure this out that would be appreciated.