diff --git a/Gallery.Share/Resources/UI/Definition.cs b/Gallery.Share/Resources/UI/Definition.cs
index f69e9d4..1c5d5a7 100644
--- a/Gallery.Share/Resources/UI/Definition.cs
+++ b/Gallery.Share/Resources/UI/Definition.cs
@@ -91,6 +91,7 @@ namespace Gallery.Resources.UI
                     }
                     else if (model.StartsWith("iPad"))
                     {
+                        _isFullscreenDevice = false;
                         var vs = model[4..].Split(',');
                         if (vs.Length == 2 && int.TryParse(vs[0], out int main) && int.TryParse(vs[1], out int sub))
                         {
@@ -99,10 +100,6 @@ namespace Gallery.Resources.UI
                             var flag = main == 8 || (main == 13 && sub >= 4 && sub < 12);
                             _isBottomPadding = flag;
                         }
-                        else
-                        {
-                            _isFullscreenDevice = false;
-                        }
                     }
                     else
                     {
diff --git a/Gallery.Share/Resources/UI/GalleryCollectionPage.cs b/Gallery.Share/Resources/UI/GalleryCollectionPage.cs
index e9beccd..21d5be5 100644
--- a/Gallery.Share/Resources/UI/GalleryCollectionPage.cs
+++ b/Gallery.Share/Resources/UI/GalleryCollectionPage.cs
@@ -469,13 +469,17 @@ namespace Gallery.Resources.UI
                 {
                     item.PreviewImage = Definition.DownloadBackground;
 #if DEBUG
-                    System.Threading.Thread.Sleep(500);
-#else
+                    var model = Xamarin.Essentials.DeviceInfo.Model;
+                    if (model.StartsWith("iPhone") || model.StartsWith("iPad"))
+                    {
+#endif
                     var image = Store.LoadPreviewImage(item.PreviewUrl, true, force: true).Result;
                     if (image != null)
                     {
                         item.PreviewImage = image;
                     }
+#if DEBUG
+                    }
 #endif
                 }
                 return true;
diff --git a/Gallery.iOS/Gallery.iOS.csproj b/Gallery.iOS/Gallery.iOS.csproj
index 7838a37..667d981 100644
--- a/Gallery.iOS/Gallery.iOS.csproj
+++ b/Gallery.iOS/Gallery.iOS.csproj
@@ -60,6 +60,7 @@
     <MtouchInterpreter>-all</MtouchInterpreter>
     <CodesignProvision>Gallery.Dev</CodesignProvision>
     <LangVersion>9.0</LangVersion>
+    <MtouchFastDev>true</MtouchFastDev>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhone' ">
     <DebugType>none</DebugType>