Rigidbody2D.velocity problem with ground collision

Hi,
I have a problem with the movement of characters. It's sometimes blocked on the border of a ground collision. The collision I use is tilemap collider2D.

I post screen how look this problem.

Movement script:

void Move()
{
float inputHorizontal = Input.GetAxisRaw("Horizontal");

rigidbody2D.velocity = new Vector2(inputHorizontal * 4f, rigidbody2D.velocity.y);
}