UI player prefab doesn't disappear after player left the room

Hi !
I'm using PUN 2. I maked a scene called "waiting room". All players who joined a room go to this scene. Each player in the scene can see the icone of other connected players. However, when a player leaves the room, his icon is still visible. Can u help me, please ? What can I do to remove his icone ?
Thanks for your answers.

This is my code :

Code (CSharp):

1. public class PlayerListingsDisplay : MonoBehaviourPunCallbacks
2. {
3.     [SerializeField]
4.     private Transform _content;
5.     [SerializeField]
6.     private PlayerListing _playerListing;
7.  
8.     private List<PlayerListing> _listings = new List<PlayerListing>();
9.  
10.     private GameObject LaunchButtonObject;
11.  
12.     private const byte EVENT_ISREADY = 14;
13.  
14.     public void Awake()
15.     {
16.         LaunchButtonObject = GameObject.Find("LaunchButton");
17.  
18.         if (!PhotonNetwork.IsMasterClient)
19.         {
20.             LaunchButtonObject.SetActive(false);
21.         }
22.         else
23.         {
24.             LaunchButtonObject.SetActive(true);
25.             LaunchButtonObject.GetComponent<Button>().interactable = false;
26.         }
27.     }
28.     public void Update()
29.     {
30.         Debug.Log("Nombre de joueurs : " + PhotonNetwork.CurrentRoom.Players.Count);
31.         Debug.Log("Nombre de listings : " + _listings.Count);
32.         GetCurrentRoomPlayers();
33.         UpdateListings();
34.     }
35.  
36.     public override void OnPlayerEnteredRoom(Player NewPlayer)
37.     {
38.         if (PhotonNetwork.CurrentRoom.Players.Last().Value == NewPlayer)
39.         {
40.             AddPlayerListing(PhotonNetwork.CurrentRoom.Players.Last());
41.         }
42.  
43.         foreach (PlayerListing Listing in _listings)
44.         {
45.             if (Listing.Player != NewPlayer)
46.             {
47.                 SendEvent_PlayerIsReady(Listing.Player, Listing.IsReady);
48.             }
49.         }
50.     }
51.  
52.     public override void OnPlayerLeftRoom(Player OtherPlayer)
53.     {
54.         PlayerListing ListingToDelete = _listings.Where(x => x.Player == OtherPlayer).FirstOrDefault();
55.  
56.         if(ListingToDelete != null)
57.         {
58.             Destroy(ListingToDelete);
59.             _listings.Remove(ListingToDelete);
60.  
61.             foreach (PlayerListing Listing in _listings)
62.             {
63.                 if (Listing.ID != 1 && Listing.ID != 2)
64.                 {
65.                     Listing.ID -= 1;
66.                 }
67.             }
68.         }
69.     }
70.  
71.     public void AddPlayerListing(KeyValuePair<int, Player> PlayerInfo)
72.     {
73.         int Index = _listings.FindIndex(x => x.Player == PlayerInfo.Value && x.ID == PlayerInfo.Key);
74.         if (Index != -1)
75.         {
76.             _listings[Index].SetPlayerInfo(PlayerInfo.Value, PlayerInfo.Key);
77.         }
78.         else
79.         {
80.             PlayerListing Listing = Instantiate(_playerListing, _content);
81.             if (Listing != null)
82.             {
83.                 Listing.SetPlayerInfo(PlayerInfo.Value, PlayerInfo.Key);
84.                 _listings.Add(Listing);
85.             }
86.         }
87.     }
88.  
89.     private void GetCurrentRoomPlayers()
90.     {
91.         if (!PhotonNetwork.IsConnected)
92.             return;
93.         if (PhotonNetwork.CurrentRoom == null || PhotonNetwork.CurrentRoom.Players == null)
94.             return;
95.  
96.         foreach (KeyValuePair<int, Player> PlayerInfo in PhotonNetwork.CurrentRoom.Players)
97.         {
98.             AddPlayerListing(PlayerInfo);
99.         }
100.     }
101.  
102.     private void UpdateListings()
103.     {
104.         int ReadyPlayersCount = 0;
105.  
106.         foreach (PlayerListing Listing in _listings)
107.         {
108.             Listing.GetComponent<RawImage>().texture = Resources.Load<Texture2D>("Textures/Sprites/GUI/Icons/Player" + Listing.ID);
109.  
110.             Debug.Log(Listing.Player.NickName + " ready : " + Listing.IsReady);
111.  
112.             if (Listing.IsReady == true)
113.             {
114.                 ReadyPlayersCount += 1;
115.                 Listing.ReadyIcon().transform.localScale = new Vector3(1, 1, 1);
116.             }
117.             else
118.             {
119.                 Listing.ReadyIcon().transform.localScale = Vector3.zero;
120.             }
121.         }
122.  
123.         if (ReadyPlayersCount == _listings.Count)
124.         {
125.             LaunchButtonObject.GetComponent<Button>().interactable = true;
126.         }
127.         else
128.         {
129.             LaunchButtonObject.GetComponent<Button>().interactable = false;
130.         }
131.     }
132.  
133.     public void OnClick_SetPlayerReady()
134.     {
135.         foreach (PlayerListing Listing in _listings)
136.         {
137.             if (Listing.Player.NickName == PhotonNetwork.NickName)
138.             {
139.                 Listing.SwitchIsReady();
140.                 SendEvent_PlayerIsReady(Listing.Player, Listing.IsReady);
141.             }
142.         }
143.     }
144.  
145.     private void OnEnable()
146.     {
147.         PhotonNetwork.NetworkingClient.EventReceived += OnReceivedEvent;
148.     }
149.  
150.     private void OnDisable()
151.     {
152.         PhotonNetwork.NetworkingClient.EventReceived -= OnReceivedEvent;
153.     }
154.  
155.     private void OnReceivedEvent(EventData obj)
156.     {
157.         object[] ReceivedObjects = (object[])obj.CustomData;
158.  
159.         if (obj.Code == EVENT_ISREADY)
160.         {
161.             foreach (PlayerListing Listing in _listings)
162.             {
163.                 if (Listing.Player == (Player) ReceivedObjects[0])
164.                 {
165.                     Listing.IsReady = (bool) ReceivedObjects[1];
166.                 }
167.             }
168.         }
169.     }
170.  
171.     private void SendEvent_PlayerIsReady(Player Gamer, bool IsReady)
172.     {
173.         object[] SendedObjects = new object[] { Gamer, IsReady };
174.         PhotonNetwork.RaiseEvent(EVENT_ISREADY, SendedObjects, RaiseEventOptions.Default, SendOptions.SendUnreliable);
175.     }
176. }