diff --git a/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/GraphQLExecutionContext.cs b/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/GraphQLExecutionContext.cs
index b6311e0ce..077f70b54 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/GraphQLExecutionContext.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/GraphQLExecutionContext.cs
@@ -15,6 +15,7 @@ using Squidex.Domain.Apps.Core;
 using Squidex.Domain.Apps.Entities.Assets;
 using Squidex.Domain.Apps.Entities.Contents.GraphQL.Types;
 using Squidex.Domain.Apps.Entities.Contents.Queries;
+using Squidex.Infrastructure;
 using Squidex.Infrastructure.Json.Objects;
 using Squidex.Infrastructure.Log;
 
@@ -70,37 +71,37 @@ namespace Squidex.Domain.Apps.Entities.Contents.GraphQL
             return await dataLoader.LoadAsync(id);
         }
 
-        public async Task<IReadOnlyList<IEnrichedAssetEntity>> GetReferencedAssetsAsync(IJsonValue value)
+        public Task<IReadOnlyList<IEnrichedAssetEntity>> GetReferencedAssetsAsync(IJsonValue value)
         {
             var ids = ParseIds(value);
 
             if (ids == null)
             {
-                return EmptyAssets;
+                return Task.FromResult<IReadOnlyList<IEnrichedAssetEntity>>(EmptyAssets);
             }
 
             var dataLoader = GetAssetsLoader();
 
-            return await dataLoader.LoadManyAsync(ids);
+            return LoadManyAsync(dataLoader, ids);
         }
 
-        public async Task<IReadOnlyList<IContentEntity>> GetReferencedContentsAsync(IJsonValue value)
+        public Task<IReadOnlyList<IContentEntity>> GetReferencedContentsAsync(IJsonValue value)
         {
             var ids = ParseIds(value);
 
             if (ids == null)
             {
-                return EmptyContents;
+                return Task.FromResult<IReadOnlyList<IContentEntity>>(EmptyContents);
             }
 
             var dataLoader = GetContentsLoader();
 
-            return await dataLoader.LoadManyAsync(ids);
+            return LoadManyAsync(dataLoader, ids);
         }
 
         private IDataLoader<Guid, IEnrichedAssetEntity> GetAssetsLoader()
         {
-            return dataLoaderContextAccessor.Context.GetOrAddBatchLoader<Guid, IEnrichedAssetEntity>("Assets",
+            return dataLoaderContextAccessor.Context.GetOrAddBatchLoader<Guid, IEnrichedAssetEntity>(nameof(GetAssetsLoader),
                 async batch =>
                 {
                     var result = await GetReferencedAssetsAsync(new List<Guid>(batch));
@@ -111,7 +112,7 @@ namespace Squidex.Domain.Apps.Entities.Contents.GraphQL
 
         private IDataLoader<Guid, IContentEntity> GetContentsLoader()
         {
-            return dataLoaderContextAccessor.Context.GetOrAddBatchLoader<Guid, IContentEntity>("References",
+            return dataLoaderContextAccessor.Context.GetOrAddBatchLoader<Guid, IContentEntity>(nameof(GetContentsLoader),
                 async batch =>
                 {
                     var result = await GetReferencedContentsAsync(new List<Guid>(batch));
@@ -120,6 +121,13 @@ namespace Squidex.Domain.Apps.Entities.Contents.GraphQL
                 });
         }
 
+        private static async Task<IReadOnlyList<T>> LoadManyAsync<TKey, T>(IDataLoader<TKey, T> dataLoader, ICollection<TKey> keys) where T : class
+        {
+            var contents = await Task.WhenAll(keys.Select(dataLoader.LoadAsync));
+
+            return contents.NotNull().ToList();
+        }
+
         private static ICollection<Guid>? ParseIds(IJsonValue value)
         {
             try
diff --git a/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/GraphQLModel.cs b/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/GraphQLModel.cs
index cd7912a4e..ab066b73b 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/GraphQLModel.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/GraphQLModel.cs
@@ -153,7 +153,7 @@ namespace Squidex.Domain.Apps.Entities.Contents.GraphQL
 
         public IObjectGraphType GetAssetType()
         {
-            return assetType as IObjectGraphType;
+            return assetType;
         }
 
         public IObjectGraphType GetContentType(Guid schemaId)
diff --git a/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/Types/Extensions.cs b/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/Types/Extensions.cs
index 39835928a..a36e6ec6f 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/Types/Extensions.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/Contents/GraphQL/Types/Extensions.cs
@@ -7,10 +7,7 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading.Tasks;
-using GraphQL.DataLoader;
 using Squidex.Domain.Apps.Core.Schemas;
-using Squidex.Infrastructure;
 using Squidex.Text;
 
 namespace Squidex.Domain.Apps.Entities.Contents.GraphQL.Types
@@ -47,12 +44,5 @@ namespace Squidex.Domain.Apps.Entities.Contents.GraphQL.Types
 
             return value;
         }
-
-        public static async Task<IReadOnlyList<T>> LoadManyAsync<TKey, T>(this IDataLoader<TKey, T> dataLoader, ICollection<TKey> keys) where T : class
-        {
-            var contents = await Task.WhenAll(keys.Select(dataLoader.LoadAsync));
-
-            return contents.NotNull().ToList();
-        }
     }
 }
diff --git a/backend/tests/Squidex.Domain.Apps.Core.Tests/Operations/HandleRules/RuleEventFormatterTests.cs b/backend/tests/Squidex.Domain.Apps.Core.Tests/Operations/HandleRules/RuleEventFormatterTests.cs
index 4f3e5bbc7..d7b1bbfca 100644
--- a/backend/tests/Squidex.Domain.Apps.Core.Tests/Operations/HandleRules/RuleEventFormatterTests.cs
+++ b/backend/tests/Squidex.Domain.Apps.Core.Tests/Operations/HandleRules/RuleEventFormatterTests.cs
@@ -279,5 +279,28 @@ namespace Squidex.Domain.Apps.Core.Operations.HandleRules
 
             Assert.Equal("Created", result);
         }
+
+        [Fact]
+        public async Task Should_return_json_string_when_array()
+        {
+            var @event = new EnrichedContentEvent
+            {
+                Data =
+                    new NamedContentData()
+                        .AddField("categories",
+                            new ContentFieldData()
+                                .AddJsonValue(JsonValue.Array("ref1", "ref2", "ref3")))
+            };
+
+            var script = @"
+Script(JSON.stringify(
+{
+    'categories': event.data.categories.iv
+}))";
+
+            var result = await sut.FormatAsync(script, @event);
+
+            Assert.Equal("{'categories':['ref1','ref2','ref3']}", result?.Replace(" ", string.Empty).Replace("\"", "'"));
+        }
     }
 }