Previous UI text sticks around even after reloading scene using SceneManager.LoadScene(scene.name);

Hi all, newbie here. I'm making a simple Unity 5.6 game that has an elapsed time and a best time. Once the game is over, a blue "game over" screen animates in that lets people re-try the game. However, I running into an issue I can't resolve:

The initial elapsed time and initial best score are "burned" into the UI and don't clear after even after I reload the scene using SceneManager.LoadScene(scene.name); See screenshots and code below.

I don't have any static variables for the timers. Is it an issue with the animator? I've spent a long time on this and can't figure it out. Thanks for any help in advance.

BallContactScript.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 
 public class BallContactScript : MonoBehaviour {
     
     public Text timerLabel;
     public Text bestTimeLabel;
 
     private int bestTime;
      private float time;
     private bool timerRunning = true;
 
     private int minutes;
     private int seconds;
     private int milliseconds;
 
     // Use this for initialization
     void Start () {
         Debug.Log ("time: " + time);
         
         Debug.Log ("bestTime: " + bestTime);
         Debug.Log ("PlayerPrefs.GetInt (bestTime): " + PlayerPrefs.GetInt ("bestTime", bestTime));
 
         timerLabel.text = "Time: 0";
 
         bestTime = PlayerPrefs.GetInt ("bestTime", bestTime);
         bestTimeLabel.text = "Best: " + bestTime;
     }
     
     // Update is called once per frame
     void Update () {
         
         // Current Time
         if (timerRunning) {
             
             time += Time.deltaTime;
             minutes = (int)time / 60;
             seconds = (int)time % 60;
             milliseconds = (int)(time * 10);
             milliseconds = milliseconds % 10;
         }
         timerLabel.text = "Time: " + (minutes * 60 + seconds).ToString("0") + "." + milliseconds.ToString("0");        
 
         // Best time
          if ((int)time > bestTime){
             bestTime = (int)time;
             bestTimeLabel.text = "Best: " + (int)time;
 
             PlayerPrefs.SetInt ("bestTime", bestTime);
         }        
     }
     
 
     void SetTimerText () {
 
     }
 
     void OnTriggerExit(Collider other) {
 
         if (other.tag == "Ball") {
             timerRunning = false;
             Debug.Log ("Lost contact");
 
             Debug.Log ("bestTime: " + bestTime);
             Debug.Log ("PlayerPrefs.GetInt (bestTime): " + PlayerPrefs.GetInt ("bestTime", bestTime));
             
             // Tell GameManager lost contact with ball
             GameManager.instance.PlayerLostContactWithBall ();
         }
     }
 
 }
 

GameManager.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class GameManager : MonoBehaviour {
 
     public static GameManager instance = null;
 
     Animator anim;
 
     private bool playerActive = false;
     private bool gameOver = false;
     
     public bool PlayerActive {
         get { return playerActive; }
     }
 
     public bool GameOver {
         get { return gameOver; }
     }
 
     void Awake() {
         if (instance == null) {
             instance = this;
         } else if (instance != this) {
             Destroy (gameObject);
         }
 
         DontDestroyOnLoad (gameObject);
 
         if (anim == null) {
             anim = GameObject.Find("HUDCanvas").GetComponent<Animator>();
          } 
          DontDestroyOnLoad (anim);
     }
 
     // Use this for initialization
     void Start () {
     }
     
     // Update is called once per frame
     void Update () {
         
     }
 
     public void PlayerLostContactWithBall () {
         gameOver = true;
         anim.SetTrigger("DidClearLevel");
     }
 
     public void PlayerRestartedLevel () {
         gameOver = false;
 
         // reset animation
         anim.Play("Empty",0,0f);
     }
 
     public void PlayerStartedLevel () {
         playerActive = true;
     }
 }
 

PlayerController.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerController : MonoBehaviour {
 
     // [SerializeField] GameObject prefab;
 
     public List<GameObject> prefabs;
 
 
     // Use this for initialization
     void Start () {
         Debug.Log ("Screen width: "+Screen.width + " Screen height: " + Screen.height);
     }
     
     // Update is called once per frame
     void Update () {
 
         if (!GameManager.instance.GameOver) {
 
             //Left mouse click 
             if (Input.GetMouseButtonDown(0)) {
          
             // Convert mouse screen coordinates to world coordinates
             Debug.Log ("Mouse position: "+Input.mousePosition);
             var mousePos = Input.mousePosition;
             mousePos.z = -35; // select distance = -35 units from the camera
              var mousePosConverted = Camera.main.ScreenToWorldPoint(mousePos);
             Debug.Log(Camera.main.ScreenToWorldPoint(mousePos));
 
             // Load prefab cubes
             GameObject fab = prefabs[Random.Range(0,prefabs.Count)];
             Instantiate(fab, new Vector3(-mousePosConverted.x,15,0), Quaternion.identity);
 
              }        
 
         }
 
     }
 
 }
 

RestartLevel.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 
 
 public class RestartLevel : MonoBehaviour {
 
     // Reload current level
     public void RestartGameLevel() {
 
         Debug.Log ("Restart Level");
         Scene scene = SceneManager.GetActiveScene();
         SceneManager.LoadScene(scene.name);
         
         // Reset level clear animation
         GameManager.instance.PlayerRestartedLevel ();        
     }
 
     // // Use this for initialization
     // void Start () {
         
     // }
     
     // // Update is called once per frame
     // void Update () {
         
     // }
 }
 

First play through shoes the time just fine:

Subsequent play throughs show the time from the initial play (Time: 9.4) behind the current time.