iOS build from Unity's physics behave differently on the phone - ios

Question

When i play the game in the editor window, everything works as intended. But when i build and play the game on the iPhone, my object bounces off of the screen. I set Physics Materials with 0 bounciness but i think this is something different.
This is the code that makes the cube jump around:
IEnumerator JumpAroundDelay()
{
while (true)
{
switch (direction)
{
case 1:
rb.velocity = new Vector2(0, 0);
rb.AddForce(new Vector2(10, 10), ForceMode2D.Impulse);
direction = 2;
yield return new WaitForSeconds(Random.Range(0.1f, top));
break;
case 2:
rb.velocity = new Vector2(0, 0);
rb.AddForce(new Vector2(-10, 10), ForceMode2D.Impulse);
direction = 1;
yield return new WaitForSeconds(Random.Range(0.1f, top));
break;
}
}
}
This is the cube's inspector window:
This is how i want it to behave
And this is how it behaves
As you can see somehow when the cube hits on its straight side on the walls, it bounces off violently. It doesn't do this in the editor or on an Android device. Only on iPhone. Anyone encountered something similar?
I tried everything from changing unity versions to manually adding non-bouncy Physics Materials to every object in the game. Nothing changed