Setting timeScale to 0 causing editor to freeze

I'm using this script I wrote a while back, but for some reason occasionally the editor and game completely freezes and I can't un pause. This use to work fine for a while, but not it freezes causing me to force quit Unity. Any ideas why this may be occurring?

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PauseMenu : MonoBehaviour {
     
     public static bool GameIsPaused = false;
 
     public GameObject pauseMenuUI;
 
     // Update is called once per frame
     void Update () {
         if (Input.GetKeyDown(KeyCode.Escape))
         {
             if (GameIsPaused)
             {
                 Resume();
             } else
             {
                 Pause();
             }
         }
     }
     
     void Resume ()
     {
         pauseMenuUI.SetActive(false);
         Time.timeScale = 1f;
         GameIsPaused = false;
         Cursor.visible = false;
         AudioListener.pause = false;
     }
     
     void Pause ()
     {
         pauseMenuUI.SetActive(true);
         Time.timeScale = .0f;
         GameIsPaused = true;
         Cursor.visible = true;
         AudioListener.pause = true;
     }
 }