diff --git a/OtterGui b/OtterGui
index 3e2d4ae9..7098e957 160000
--- a/OtterGui
+++ b/OtterGui
@@ -1 +1 @@
-Subproject commit 3e2d4ae934694918d312280d62127cf1a55b03e4
+Subproject commit 7098e9577117a3555f5f6181edae6cd306a4b5d4
diff --git a/Penumbra/Collections/Manager/ModCollectionMigration.cs b/Penumbra/Collections/Manager/ModCollectionMigration.cs
index 025df9ef..b2b8df0d 100644
--- a/Penumbra/Collections/Manager/ModCollectionMigration.cs
+++ b/Penumbra/Collections/Manager/ModCollectionMigration.cs
@@ -14,7 +14,7 @@ internal static class ModCollectionMigration
     {
         var changes = MigrateV0ToV1(collection, ref version);
         if (changes)
-            saver.ImmediateSave(new ModCollectionSave(mods, collection));
+            saver.ImmediateSaveSync(new ModCollectionSave(mods, collection));
     }
 
     /// <summary> Migrate a mod collection from Version 0 to Version 1, which introduced support for inheritance. </summary>
diff --git a/Penumbra/Mods/Editor/DuplicateManager.cs b/Penumbra/Mods/Editor/DuplicateManager.cs
index 488c1c91..7df0389e 100644
--- a/Penumbra/Mods/Editor/DuplicateManager.cs
+++ b/Penumbra/Mods/Editor/DuplicateManager.cs
@@ -82,7 +82,7 @@ public class DuplicateManager
             {
                 var sub = (SubMod)subMod;
                 sub.FileData = dict;
-                _saveService.ImmediateSave(new ModSaveGroup(mod, groupIdx));
+                _saveService.ImmediateSaveSync(new ModSaveGroup(mod, groupIdx));
             }
         }
 
diff --git a/Penumbra/Mods/ModCreator.cs b/Penumbra/Mods/ModCreator.cs
index 98770edc..383b6d2d 100644
--- a/Penumbra/Mods/ModCreator.cs
+++ b/Penumbra/Mods/ModCreator.cs
@@ -177,7 +177,7 @@ public partial class ModCreator
             return;
 
         _saveService.SaveAllOptionGroups(mod, false);
-        _saveService.ImmediateSave(new ModSaveGroup(mod.ModPath, mod.Default));
+        _saveService.ImmediateSaveSync(new ModSaveGroup(mod.ModPath, mod.Default));
     }
 
 
@@ -261,7 +261,7 @@ public partial class ModCreator
                     DefaultSettings = defaultSettings,
                 };
                 group.PrioritizedOptions.AddRange(subMods.OfType<SubMod>().Select((s, idx) => (s, idx)));
-                _saveService.ImmediateSave(new ModSaveGroup(baseFolder, group, index));
+                _saveService.ImmediateSaveSync(new ModSaveGroup(baseFolder, group, index));
                 break;
             }
             case GroupType.Single:
@@ -274,7 +274,7 @@ public partial class ModCreator
                     DefaultSettings = defaultSettings,
                 };
                 group.OptionData.AddRange(subMods.OfType<SubMod>());
-                _saveService.ImmediateSave(new ModSaveGroup(baseFolder, group, index));
+                _saveService.ImmediateSaveSync(new ModSaveGroup(baseFolder, group, index));
                 break;
             }
         }
@@ -321,7 +321,7 @@ public partial class ModCreator
         }
 
         IncorporateMetaChanges(mod.Default, directory, true);
-        _saveService.ImmediateSave(new ModSaveGroup(mod, -1));
+        _saveService.ImmediateSaveSync(new ModSaveGroup(mod, -1));
     }
 
     /// <summary> Return the name of a new valid directory based on the base directory and the given name. </summary>
diff --git a/Penumbra/Services/ConfigMigrationService.cs b/Penumbra/Services/ConfigMigrationService.cs
index 03aedc57..beb23fa2 100644
--- a/Penumbra/Services/ConfigMigrationService.cs
+++ b/Penumbra/Services/ConfigMigrationService.cs
@@ -372,7 +372,7 @@ public class ConfigMigrationService
             var emptyStorage = new ModStorage();
             var collection = ModCollection.CreateFromData(_saveService, emptyStorage, ModCollection.DefaultCollectionName, 0, 1, dict,
                 Array.Empty<string>());
-            _saveService.ImmediateSave(new ModCollectionSave(emptyStorage, collection));
+            _saveService.ImmediateSaveSync(new ModCollectionSave(emptyStorage, collection));
         }
         catch (Exception e)
         {
diff --git a/Penumbra/Services/SaveService.cs b/Penumbra/Services/SaveService.cs
index 0e61c565..3f54160d 100644
--- a/Penumbra/Services/SaveService.cs
+++ b/Penumbra/Services/SaveService.cs
@@ -36,7 +36,8 @@ public sealed class SaveService : SaveServiceBase<FilenameService>
             }
         }
 
-        for (var i = 0; i < mod.Groups.Count; ++i)
+        for (var i = 0; i < mod.Groups.Count - 1; ++i)
             ImmediateSave(new ModSaveGroup(mod, i));
+        ImmediateSaveSync(new ModSaveGroup(mod, mod.Groups.Count - 1));
     }
 }