Use QueueFree instead of RemoveChild

src/Extensions.cs

@@ -2,9 +2,6 @@ using Godot;
 
 public static class Extensions
 {
-    public static void RemoveFromParent(this Node @this)
-        => @this.GetParent().RemoveChild(@this);
-
     public static T Init<T>(this PackedScene @this)
         where T : Node
     {

src/Network.cs

@@ -78,7 +78,7 @@ public class Network : Node
         LocalPlayer.Instance.NetworkID = -1;
         foreach (var player in _playersById.Values)
             if (!player.IsLocal)
-                player.RemoveFromParent();
+                player.QueueFree();
         _playersById.Clear();
     }
 
@@ -224,7 +224,7 @@ public class Network : Node
 
     private void OnPeerDisconnected(int id)
     {
-        GetPlayer(id)?.RemoveFromParent();
+        GetPlayer(id)?.QueueFree();
         _playersById.Remove(id);
     }
 }