* Fixed "MentionedAttribute"

* Improved "MentionedFilter"

Telegrator/Annotations/MentionedAttribute.cs

@@ -13,7 +13,7 @@ namespace Telegrator.Annotations
         /// Initializes a new instance of the MentionedAttribute that matches any mention.
         /// </summary>
         public MentionedAttribute()
-            : base(new MessageHasEntityFilter(MessageEntityType.Mention, 0, null), new MentionedFilter()) { }
+            : base(new MessageHasEntityFilter(MessageEntityType.Mention, null, null), new MentionedFilter()) { }
 
         /// <summary>
         /// Initializes a new instance of the MentionedAttribute that matches mentions at a specific offset.

Telegrator/Filters/MentionedFilter.cs

@@ -1,4 +1,5 @@
 using Telegram.Bot.Types;
+using Telegram.Bot.Types.Enums;
 using Telegrator.Filters.Components;
 
 namespace Telegrator.Filters
@@ -45,8 +46,19 @@ namespace Telegrator.Filters
                 return false;
 
             string userName = Mention ?? context.BotInfo.User.Username ?? throw new ArgumentNullException(nameof(context), "MentionedFilter requires BotInfo to be initialized");
-            IEnumerable<MessageHasEntityFilter> entityFilter = context.CompletedFilters.Get<MessageHasEntityFilter>();
-            return entityFilter.Any(fltr => fltr.FoundEntities.Any(ent => Target.Text.Substring(ent.Offset + 1, ent.Length - 1) == userName));
+            IEnumerable<MessageEntity> entities = context.CompletedFilters
+                .Get<MessageHasEntityFilter>()
+                .SelectMany(ent => ent.FoundEntities)
+                .Where(ent => ent.Type == MessageEntityType.Mention);
+
+            foreach (MessageEntity ent in entities)
+            {
+                string mention = Target.Text.Substring(ent.Offset + 1, ent.Length - 1);
+                if (mention == userName)
+                    return true;
+            }
+
+            return false;
         }
     }
 }

Telegrator/Filters/MessageFilters.cs

@@ -202,7 +202,7 @@ namespace Telegrator.Filters
         /// <param name="type">The entity type to filter by.</param>
         /// <param name="offset">The offset to filter by.</param>
         /// <param name="length">The length to filter by.</param>
-        public MessageHasEntityFilter(MessageEntityType type, int offset, int? length)
+        public MessageHasEntityFilter(MessageEntityType type, int? offset, int? length)
         {
             EntityType = type;
             Offset = offset;
@@ -215,7 +215,7 @@ namespace Telegrator.Filters
         /// <param name="type">The entity type to filter by.</param>
         /// <param name="content">The content to filter by.</param>
         /// <param name="stringComparison">The string comparison to use.</param>
-        public MessageHasEntityFilter(MessageEntityType type, string content, StringComparison stringComparison = StringComparison.CurrentCulture)
+        public MessageHasEntityFilter(MessageEntityType type, string? content, StringComparison stringComparison = StringComparison.CurrentCulture)
         {
             EntityType = type;
             Content = content;
@@ -230,7 +230,7 @@ namespace Telegrator.Filters
         /// <param name="length">The length to filter by.</param>
         /// <param name="content">The content to filter by.</param>
         /// <param name="stringComparison">The string comparison to use.</param>
-        public MessageHasEntityFilter(MessageEntityType type, int offset, int? length, string content, StringComparison stringComparison = StringComparison.CurrentCulture)
+        public MessageHasEntityFilter(MessageEntityType type, int? offset, int? length, string? content, StringComparison stringComparison = StringComparison.CurrentCulture)
         {
             EntityType = type;
             Offset = offset;

Telegrator/Handlers/Components/BranchingUpdateHandler.cs

@@ -88,6 +88,15 @@ namespace Telegrator.Handlers.Components
             if (!AllowedBranchReturnTypes.Any(branch.ReturnType.Equals))
                 throw new Exception();
 
+            try
+            {
+                handlerAttribute = HandlerInspector.GetHandlerAttribute(branch);
+            }
+            finally
+            {
+                _ = 0xBAD + 0xC0DE;
+            }
+
             List<IFilter<Update>> branchFiltersList = HandlerInspector.GetFilterAttributes(branch, HandlingUpdateType).ToList();
             branchFiltersList.AddRange(handlerFilters);