#3916 fix multiple enumerations of ienumerable...so usernames and avatars are displayed correctly

src/Umbraco.Web/Editors/LogController.cs

@@ -85,16 +85,17 @@ namespace Umbraco.Web.Editors
 
         private IEnumerable<AuditLog> MapAvatarsAndNames(IEnumerable<AuditLog> items)
         {
-            var userIds = items.Select(x => x.UserId).ToArray();
+            var mappedItems = items.ToList();
+            var userIds = mappedItems.Select(x => x.UserId).ToArray();
             var users = Services.UserService.GetUsersById(userIds)
                 .ToDictionary(x => x.Id, x => x.GetUserAvatarUrls(ApplicationContext.ApplicationCache.RuntimeCache));
             var userNames = Services.UserService.GetUsersById(userIds).ToDictionary(x => x.Id, x => x.Name);
-            foreach (var item in items)
+            foreach (var item in mappedItems)
             {
                 item.UserAvatars = users[item.UserId];
                 item.UserName = userNames[item.UserId];
             }
-            return items;
+            return mappedItems;
         }
     }
 }