1 files changed, 35 insertions, 14 deletions
diff --git a/Emby.Server.Implementations/Collections/CollectionManager.cs b/Emby.Server.Implementations/Collections/CollectionManager.cs
index 1ab2bdfbe..1b85a9d4b 100644
--- a/Emby.Server.Implementations/Collections/CollectionManager.cs
+++ b/Emby.Server.Implementations/Collections/CollectionManager.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Threading;
@@ -8,11 +7,9 @@ using System.Threading.Tasks;
 using Jellyfin.Data.Entities;
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Controller.Collections;
-using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Movies;
 using MediaBrowser.Controller.Library;
-using MediaBrowser.Controller.Plugins;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Model.Configuration;
 using MediaBrowser.Model.Entities;
@@ -124,7 +121,7 @@ namespace Emby.Server.Implementations.Collections
 
         private IEnumerable<BoxSet> GetCollections(User user)
         {
-            var folder = GetCollectionsFolder(false).Result;
+            var folder = GetCollectionsFolder(false).GetAwaiter().GetResult();
 
             return folder == null
                 ? Enumerable.Empty<BoxSet>()
@@ -319,11 +316,11 @@ namespace Emby.Server.Implementations.Collections
         {
             var results = new Dictionary<Guid, BaseItem>();
 
-            var allBoxsets = GetCollections(user).ToList();
+            var allBoxSets = GetCollections(user).ToList();
 
             foreach (var item in items)
             {
-                if (!(item is ISupportsBoxSetGrouping))
+                if (item is not ISupportsBoxSetGrouping)
                 {
                     results[item.Id] = item;
                 }
@@ -331,20 +328,44 @@ namespace Emby.Server.Implementations.Collections
                 {
                     var itemId = item.Id;
 
-                    var currentBoxSets = allBoxsets
-                        .Where(i => i.ContainsLinkedChildByItemId(itemId))
-                        .ToList();
+                    var itemIsInBoxSet = false;
+                    foreach (var boxSet in allBoxSets)
+                    {
+                        if (!boxSet.ContainsLinkedChildByItemId(itemId))
+                        {
+                            continue;
+                        }
+
+                        itemIsInBoxSet = true;
+
+                        results.TryAdd(boxSet.Id, boxSet);
+                    }
 
-                    if (currentBoxSets.Count > 0)
+                    // skip any item that is in a box set
+                    if (itemIsInBoxSet)
                     {
-                        foreach (var boxset in currentBoxSets)
+                        continue;
+                    }
+
+                    var alreadyInResults = false;
+                    // this is kind of a performance hack because only Video has alternate versions that should be in a box set?
+                    if (item is Video video)
+                    {
+                        foreach (var childId in video.GetLocalAlternateVersionIds())
                         {
-                            results[boxset.Id] = boxset;
+                            if (!results.ContainsKey(childId))
+                            {
+                                continue;
+                            }
+
+                            alreadyInResults = true;
+                            break;
                         }
                     }
-                    else
+
+                    if (!alreadyInResults)
                     {
-                        results[item.Id] = item;
+                        results[itemId] = item;
                     }
                 }
             }