OnCollisionStay2D is ignoring OnCollisionEnter2D

I have a round player with Circle Collider 2D and obstacles with Edge Collider 2D. When player touches one obstacle, player changes color and keeps changing colors and expanding until player moves away from obstacle, but if the player touches the second obstacle while still touching the first, the game is restarted. I have a problem with detecting second obstacle. Sometimes second obstacle is detected and my OnCollisionEnter2D works fine, but most of the time it doesn't. I feel like program is doing only OnCollisionStay2D and it is ignoring OnCollisionEnter2D so in the meanwhile player touches one more obstacle while still touching the first but the game is not restarted. It feels like it is doing OnCollisionStay2D forever. Collision detectiod: Continous

 void OnCollisionEnter2D (Collision2D other){
         if (other.gameObject.tag == "Obstacles" && wasDetected == false) 
         {
             wasDetected = true;
             Debug.Log (other.gameObject.name);
         } 
         else if (other.gameObject.tag == "Obstacles" && wasDetected == true) 
         {
             wasDetected = false;
             Debug.Log (other.gameObject.name);
             theGameManager.RestartGame();
         }
     }
 
     void OnCollisionExit2D (Collision2D other){
         wasDetected = false;
     }
 
     void OnCollisionStay2D (Collision2D other){
         if (other.gameObject.tag == "Obstacles") 
         {
             transform.localScale = new Vector3 (transform.localScale.x + 0.1f, transform.localScale.y + 0.1f, transform.localScale.z);
             myColor.color = new Color(myColor.color.r + 0.05f, 0, 0);
         }
     }