diff --git a/src/Markdig.Tests/TestAutoLinks.cs b/src/Markdig.Tests/TestAutoLinks.cs
index c72ac01..005c3d1 100644
--- a/src/Markdig.Tests/TestAutoLinks.cs
+++ b/src/Markdig.Tests/TestAutoLinks.cs
@@ -21,28 +21,4 @@ public class TestAutoLinks
 
         Assert.That(html, Is.EqualTo(expected).IgnoreWhiteSpace);
     }
-
-    // https://github.com/xoofx/markdig/issues/668
-    // A heading's implicit reference must not resolve inside another still-open
-    // link bracket, which would break the outer link.
-    [Test]
-    public void TestAutoIdentifierHeadingLinkDoesNotHijackNestedLinkLabel()
-    {
-        var markdown = "# Testing Markdown\n\n" +
-                        "### Header\n\n" +
-                        "[Testing [Header]](https://www.bing.com)\n\n" +
-                        "[Testing [test]](https://www.google.com)\n";
-        var expected = "<h1 id=\"testing-markdown\">Testing Markdown</h1>\n" +
-                        "<h3 id=\"header\">Header</h3>\n" +
-                        "<p><a href=\"https://www.bing.com\">Testing [Header]</a></p>\n" +
-                        "<p><a href=\"https://www.google.com\">Testing [test]</a></p>";
-
-        var pipeline = new MarkdownPipelineBuilder()
-            .UseAutoLinks()
-            .UseAutoIdentifiers()
-            .Build();
-        var html = Markdown.ToHtml(markdown, pipeline);
-
-        Assert.That(html, Is.EqualTo(expected).IgnoreWhiteSpace);
-    }
 }
diff --git a/src/Markdig/Extensions/AutoIdentifiers/HeadingLinkReferenceDefinition.cs b/src/Markdig/Extensions/AutoIdentifiers/HeadingLinkReferenceDefinition.cs
index b57c785..32562cc 100644
--- a/src/Markdig/Extensions/AutoIdentifiers/HeadingLinkReferenceDefinition.cs
+++ b/src/Markdig/Extensions/AutoIdentifiers/HeadingLinkReferenceDefinition.cs
@@ -24,11 +24,4 @@ public class HeadingLinkReferenceDefinition : LinkReferenceDefinition
     /// Gets or sets the heading related to this link reference definition.
     /// </summary>
     public HeadingBlock Heading { get; set; }
-
-    /// <inheritdoc />
-    /// <remarks>
-    /// Created implicitly for every heading, so it must not resolve inside another
-    /// still-open link bracket, e.g. <c>[Some text [Heading]](url)</c>.
-    /// </remarks>
-    internal override bool AllowResolutionInsideOpenLink => false;
 }
diff --git a/src/Markdig/Parsers/Inlines/LinkInlineParser.cs b/src/Markdig/Parsers/Inlines/LinkInlineParser.cs
index 0701ae4..83ac5db 100644
--- a/src/Markdig/Parsers/Inlines/LinkInlineParser.cs
+++ b/src/Markdig/Parsers/Inlines/LinkInlineParser.cs
@@ -150,13 +150,6 @@ public class LinkInlineParser : InlineParser
             return false;
         }
 
-        // An implicit definition must not hijack a bracket nested inside a
-        // still-open link, which would break the outer one.
-        if (!linkRef.AllowResolutionInsideOpenLink && HasActiveAncestorLink(parent))
-        {
-            return false;
-        }
-
         Inline? link = null;
         // Try to use a callback directly defined on the LinkReferenceDefinition
         if (linkRef.CreateLinkInline != null)
@@ -437,24 +430,6 @@ public class LinkInlineParser : InlineParser
         }
     }
 
-    /// <summary>
-    /// Determines whether the delimiter is nested inside another link/image
-    /// delimiter that may still resolve.
-    /// </summary>
-    private static bool HasActiveAncestorLink(LinkDelimiterInline delimiter)
-    {
-        var inline = delimiter.Parent;
-        while (inline != null)
-        {
-            if (inline is LinkDelimiterInline { IsActive: true })
-            {
-                return true;
-            }
-            inline = inline.Parent;
-        }
-        return false;
-    }
-
     private static void MarkParentAsInactive(Inline? inline)
     {
         while (inline != null)
diff --git a/src/Markdig/Syntax/LinkReferenceDefinition.cs b/src/Markdig/Syntax/LinkReferenceDefinition.cs
index e70a574..056d91d 100644
--- a/src/Markdig/Syntax/LinkReferenceDefinition.cs
+++ b/src/Markdig/Syntax/LinkReferenceDefinition.cs
@@ -136,16 +136,6 @@ public class LinkReferenceDefinition : LeafBlock
     /// </remarks>
     public CreateLinkInlineDelegate? CreateLinkInline { get; set; }
 
-    /// <summary>
-    /// Gets whether this definition may resolve into a link while its label is
-    /// nested inside another still-open link or image bracket.
-    /// </summary>
-    /// <remarks>
-    /// <c>true</c> for user-authored definitions, preserving CommonMark's "links
-    /// cannot contain links". Implicitly generated ones override it to <c>false</c>.
-    /// </remarks>
-    internal virtual bool AllowResolutionInsideOpenLink => true;
-
     /// <summary>
     /// Tries to the parse the specified text into a definition.
     /// </summary>