Physics2D.OverlapBox not working on Composite Colliders

I'm using Physics2D.OverlapBox for my ground detection which works nicely, but once I have a tilemap my players starts catching on the edges between tiles.
As soon as I add a CompositeCollider 2D and select Used by Composite on the Tilemap Collider 2D, the OverlapBox method no longer returns a collider when the box overlaps with the composite tilemap collider.
I'm not using any layer mask, my code is simply:

Code (CSharp):

1. Collider2D collisionAtFeet = Physics2D.OverlapBox(new Vector2(boxX, boxY), new Vector2(halfColliderWidth, 0.2f), 0.0f);

I can use Debug.DrawLine to confirm the box is in the right place.

This looks like a bug in Unity to me, I'm hoping someone can tell me otherwise or provide a workaround.

Thanks!

 

Looking at the documentation, this is solved by selecting Polygons as the Geometry type, rather than Outlines, which is the default and essentially produces Edge colliders. This explains the behaviour I was seeing.

 

TLDR: By switching the Geometry Type to polygons, now Physics2D.OverlapPoint returns what you'd expect