Casting Rigidbody2D not detecting overlapping objects

Unity Engine
1

In this scene I have the circle casting it’s collider shape to the left and returning a value if anything is hit. But as you can see it stops detecting the square as soon as it overlaps with it. How can I make it so it continues to detect objects even when they’re overlapping?
8420271--1113951--ezgif.com-gif-maker (1).gif

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Test2 : MonoBehaviour
{
    public float moveSpeed;
    // Start is called before the first frame update
    void Start()
    {
       
    }

    // Update is called once per frame
    void Update()
    {
        Rigidbody2D rb = GetComponent<Rigidbody2D>();
        RaycastHit2D[] hitResults = new RaycastHit2D[1];
        int numberHit = rb.Cast(Vector3.left, hitResults, moveSpeed);

        if (numberHit > 0)
        {
            print("Hit " + numberHit + " colliders.");
            for (int i = 0; i < numberHit; ++i) print("Hit this: " + hitResults[i].collider.name);
        }

        if (numberHit == 0)
        {
            print("Nothing hit!");
        }
    }
}
2

Casting from inside a collider (even partially) generally won’t return a hit.

You would need to retain the position of something outside of the target collider and never move that into the collider.

3

You should probably be using any of the ‘Overlap’ methods in the Physics2d class such as overlap circle: Unity - Scripting API: Physics2D.OverlapCircle

4

I see! The thing I’m trying to do is have the circle detect a hit even when it’s perfectly adjacent to the square. Right now if I have the shapes snap to the grid so I can place them perfectly adjacent to each other, theres no hit’s detected even though they aren’t overlapping.