Unity 3D - Collider bug in 2D - unity3d

Question

I have a problem with Unity 2D collider, shown in this video: https://youtu.be/AMof6lJNtNk
Red wall is "killing" me, but just after game start/respawn. I'm colliding with 2 walls (brick has smaller collider than red wall) and I'm dying, but if I first collide to brick, then to red wall I don't die. Why?
I don't want to die in either case.
using UnityEngine;
using System.Collections;
public class MovementScript : MonoBehaviour {
public float speed = 1.0f;
Vector3 spawn;
// Use this for initialization
void Start () {
GetComponent ().freezeRotation = true;
spawn = GetComponent ().transform.position;
}
// Update is called once per frame
void Update () {
//Debug.Log ("Vertical: " + Input.GetAxis ("Vertical"));
if (Input.GetAxis ("Vertical") > 0) {
GetComponent ().velocity = new Vector2 (0, 1)*speed;
} else if (Input.GetAxis ("Vertical") ().velocity = new Vector2 (0, -1)*speed;
}
if (Input.GetAxis ("Horizontal") > 0) {
GetComponent ().velocity = new Vector2 (1, 0)*speed;
} else if (Input.GetAxis ("Horizontal") ().velocity = new Vector2 (-1, 0)*speed;
}
}
void OnTriggerEnter2D (Collider2D col){
Debug.Log ("Koliduje!");
if (col.transform.tag == "Respawn") {
Debug.Log ("Skułeś się!");
GetComponent ().transform.position = spawn;
}
}
}