How does Unity's Collider.Bounds work?

From waht I understand, Collider.Bounds are the sides or bounds of the collider of the GameObject (at least for a cube with a BoxCollider). But I got a result that I wasn't expecting when I tried moving a cube continuously downwards and drawing the bounds with lines. While moving frame by frame, the collider bounds seemed to be not bounding the cube (or at least that's what my test is showing, if my test is correct).

Here's 3 frames of screenshot:

What I did for this is create a new 3D project, add a Cube, then added a single script and then added this script to the Cube. The whole script is:

using UnityEngine;


public class NewBehaviourScript : MonoBehaviour
{
    Vector3 velocity;

    // Start is called before the first frame update
    void Start()
    {
        velocity = Vector3.zero;
    }


    // Update is called once per frame
    void Update()
    {
        velocity.y += -0.5f;
        transform.Translate(velocity);

        Bounds bounds = GetComponent().bounds;
        Debug.DrawLine(new Vector3(bounds.min.x, bounds.min.y, bounds.min.z), new Vector3(bounds.max.x, bounds.min.y, bounds.min.z), Color.red);
        Debug.DrawLine(new Vector3(bounds.max.x, bounds.min.y, bounds.min.z), new Vector3(bounds.max.x, bounds.max.y, bounds.min.z), Color.red);

        Debug.DrawLine(new Vector3(bounds.max.x, bounds.max.y, bounds.min.z), new Vector3(bounds.min.x, bounds.max.y, bounds.min.z), Color.red);
        Debug.DrawLine(new Vector3(bounds.min.x, bounds.max.y, bounds.min.z), new Vector3(bounds.min.x, bounds.min.y, bounds.min.z), Color.red);
        Debug.DrawLine(bounds.min, bounds.max, Color.red);
    }
}

Am I not understanding something or am I doing something wrong?

Answer

As @DMGregory stated, I needed to notify the Physics system by using Physics.SyncTransforms() after every call to Transform.Translate() and the Collider lined up perfectly after that.