PhysicsMaterial2D and bounciness: Getting weird angles when hitting box collider edges

Hi all,

I'm building a 2D brick breaker game and I'm using PhysicsMaterial2D in the ball. Friction is set to 0 and bounciness is set to 1. The ball has a circle collider and a dynamic rigidbody with continuous collision detection.

The bricks are static rigidbodies with a box collider. The behavior that I want for the collision is to preserve the ball's rigidbody velocity and invert its X or Y depending if the ball collided with sides or top/bottom of the brick.

The issue is that I'm getting weird angles when the ball hits the edge of the bricks or between two bricks. Here's a video: https://drive.google.com/file/d/1kpiHxU_yQCxIGA68ziag9ho1p2NlCact/view

Here's the code I'm using to debug this:

 void Update()
 {
 
     GetVelocity();
 
     if (brickCollisions > 0)
         brickCollisions = 0;
 }
 
 void GetVelocity()
 {
     lastFrameVelocity = rb.velocity;
 }
     void OnCollisionEnter2D(Collision2D col)
 {
     if (col.gameObject.tag == "Common Brick")
     {
 
         brickCollisions++;
         Debug.Log("Brick collisions: " + brickCollisions + " / " + "Velocity before collision: " + lastFrameVelocity + " / " + "Velocity after collision: " + rb.velocity);
 
     }
 
 }

And here's an example (not the same as video) of what's happening when the ball hits edges:

 Brick collisions: 1 / Velocity before collision: (2.0, 2.0) / Velocity after collision: (2.0, -2.0)
 
 Brick collisions: 1 / Velocity before collision: (2.0, -2.0) / Velocity after collision: (2.0, 2.0)
 
 Brick collisions: 1 / Velocity before collision: (2.0, 2.0) / Velocity after collision: (0.2, -2.8)
 
 Brick collisions: 1 / Velocity before collision: (0.2, -2.8) / Velocity after collision: (-0.9, 2.7)
 
 Brick collisions: 1 / Velocity before collision: (-0.9, 2.7) / Velocity after collision: (-0.9, -2.7)

And this is when the ball hits between two bricks (which can very well be the same issue as above):

 Brick collisions: 1 / Velocity before collision: (2.0, 2.0) / Velocity after collision: (2.0, -2.0)
 
 Brick collisions: 1 / Velocity before collision: (2.0, -2.0) / Velocity after collision: (2.0, 2.0)
 
 Brick collisions: 1 / Velocity before collision: (2.0, 2.0) / Velocity after collision: (2.0, -2.0)
 
 Brick collisions: 1 / Velocity before collision: (2.0, -2.0) / Velocity after collision: (-0.9, 2.7)
 
 Brick collisions: 2 / Velocity before collision: (2.0, -2.0) / Velocity after collision: (-0.9, 2.7)