"Escape" not working to open menu?

Hey guys! I have another (hopefully) easy question to answer. For some reason, the menu does not open when I press "Escape", but closes when I press "Escape" and its already open. Anybody know why?

 public bool isInMenu;
     
     // Update is called once per frame
     void Update () 
     {
     if(Input.GetKey(KeyCode.Escape) && isInMenu == false && NetworkManager.Instance.MyPlayer.IsAlive == true)
     {
     isInMenu = true;
     Debug.Log("Menu Opened");
     }
     if(Input.GetKey(KeyCode.Escape) && isInMenu == true && NetworkManager.Instance.MyPlayer.IsAlive == true)
     {
     isInMenu = false;
     Debug.Log("Menu Closed");
     }
     }
     
     void OnGUI()
     {
     if(isInMenu == true)
         {
         InGameMenu();
         }
     }
     
     void InGameMenu()
     {
     if(GUI.Button(new Rect(Screen.width * (0.1f/10f),Screen.height * (0.1f/6.3f),Screen.width/2, Screen.height/2), "Disconnect"))
         {
         Network.Disconnect();
         }
     }