Fixed new changes not being saved

MainForm.cs

@@ -8,6 +8,7 @@ using System.Text.Json;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 using RokettoLaunch.Models;
+using RokettoLaunch.Windows.Forms;
 using RyzStudio;
 using RyzStudio.Windows.Forms;
 using RyzStudio.Windows.ThemedForms;
@@ -515,7 +516,22 @@ namespace RokettoLaunch
                 this.CurrentSession.Groups = new List<TileGroupModel>();
                 foreach (var container in flowLayoutPanel1.Controls.OfType<RyzStudio.Windows.TileForms.TileContainer>())
                 {
-                    this.CurrentSession.Groups.Add((TileGroupModel)container.Tag);
+                    var newTag = (TileGroupModel)container.Tag;
+                    if (newTag == null)
+                    {
+                        continue;
+                    }
+
+                    newTag.Items = new List<TileModel>();
+
+                    foreach (var tile in container.Controls.OfType<TilePanel>())
+                    {
+                        tile.ModelInfo.Position = container.GetCoord(tile);
+
+                        newTag.Items.Add(tile.ModelInfo);
+                    }
+
+                    this.CurrentSession.Groups.Add(newTag);
                 }
 
                 var result = GenericResult.Create();