diff --git a/hugolib/content_render_hooks_test.go b/hugolib/content_render_hooks_test.go
index de8eb720f..9df8d2e2e 100644
--- a/hugolib/content_render_hooks_test.go
+++ b/hugolib/content_render_hooks_test.go
@@ -350,3 +350,31 @@ Image: ![alt-"<>&](/destination-"<> 'title-"<>&')
 		})
 	}
 }
+
+// Issue 13410.
+func TestRenderHooksMultilineTitlePlainText(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+-- content/p1.md --
+---
+title: "p1"
+---
+
+First line.
+Second line.
+----------------
+-- layouts/_default/_markup/render-heading.html --
+Plain text: {{ .PlainText }}|Text: {{ .Text }}|
+-- layouts/_default/single.html --
+Content: {{ .Content}}|
+}
+`
+	b := Test(t, files)
+
+	b.AssertFileContent("public/p1/index.html",
+		"Content: Plain text: First line.\nSecond line.|",
+		"|Text: First line.\nSecond line.||\n",
+	)
+}
diff --git a/markup/goldmark/goldmark_integration_test.go b/markup/goldmark/goldmark_integration_test.go
index 184d0d7fc..a65600951 100644
--- a/markup/goldmark/goldmark_integration_test.go
+++ b/markup/goldmark/goldmark_integration_test.go
@@ -157,7 +157,7 @@ title: "p1"
 	b := hugolib.Test(t, files)
 
 	b.AssertFileContent("public/p1/index.html",
-		"<h2 id=\"hello-testhttpsexamplecom\">\n  Hello <a href=\"https://example.com\">Test</a>\n\n  <a class=\"anchor\" href=\"#hello-testhttpsexamplecom\">#</a>\n</h2>",
+		"<h2 id=\"hello-test\">\n  Hello <a href=\"https://example.com\">Test</a>\n\n  <a class=\"anchor\" href=\"#hello-test\">#</a>\n</h2>",
 	)
 }
 
diff --git a/markup/goldmark/internal/extensions/attributes/attributes.go b/markup/goldmark/internal/extensions/attributes/attributes.go
index 526635f45..f5f6f97b4 100644
--- a/markup/goldmark/internal/extensions/attributes/attributes.go
+++ b/markup/goldmark/internal/extensions/attributes/attributes.go
@@ -1,6 +1,8 @@
 package attributes
 
 import (
+	"strings"
+
 	"github.com/gohugoio/hugo/markup/goldmark/goldmark_config"
 	"github.com/gohugoio/hugo/markup/goldmark/internal/render"
 	"github.com/yuin/goldmark"
@@ -181,12 +183,17 @@ func (a *transformer) generateAutoID(n ast.Node, reader text.Reader, pc parser.C
 }
 
 // Markdown settext headers can have multiple lines, use the last line for the ID.
-func textHeadingID(node *ast.Heading, reader text.Reader) []byte {
-	var line []byte
-	lastIndex := node.Lines().Len() - 1
-	if lastIndex > -1 {
-		lastLine := node.Lines().At(lastIndex)
-		line = lastLine.Value(reader.Source())
+func textHeadingID(n *ast.Heading, reader text.Reader) []byte {
+	text := render.TextPlain(n, reader.Source())
+	if n.Lines().Len() > 1 {
+
+		// For multiline headings, Goldmark's extension for headings returns the last line.
+		// We have a slightly different approach, but in most cases the end result should be the same.
+		// Instead of looking at the text segments in Lines (see #13405 for issues with that),
+		// we split the text above and use the last line.
+		parts := strings.Split(text, "\n")
+		text = parts[len(parts)-1]
 	}
-	return line
+
+	return []byte(text)
 }
diff --git a/markup/goldmark/internal/extensions/attributes/attributes_integration_test.go b/markup/goldmark/internal/extensions/attributes/attributes_integration_test.go
index fcce68ac2..90cf3d084 100644
--- a/markup/goldmark/internal/extensions/attributes/attributes_integration_test.go
+++ b/markup/goldmark/internal/extensions/attributes/attributes_integration_test.go
@@ -47,10 +47,12 @@ foo [something](/a/b/) bar
 Ā ā Ă ă Ą ą Ć ć Ĉ ĉ Ċ ċ Č č Ď
 : Testing accents.
 
-Mutiline set text header
+Multiline set text header
 Second line
 ---------------
 
+## Example [hyperlink](https://example.com/) in a header
+
 -- layouts/_default/single.html --
 {{ .Content }}|Identifiers: {{ .Fragments.Identifiers }}|
 `
@@ -68,7 +70,8 @@ Second line
 		`<dt id="my-title-1">My Title</dt>`,
 		`<dt id="term">良善天父</dt>`,
 		`<dt id="a-a-a-a-a-a-c-c-c-c-c-c-c-c-d">Ā ā Ă ă Ą ą Ć ć Ĉ ĉ Ċ ċ Č č Ď</dt>`,
-		`<h2 id="second-line">Mutiline set text header`,
-		"|Identifiers: [a-a-a-a-a-a-c-c-c-c-c-c-c-c-d base-name base-name-1 foo-something-bar foobar my-title my-title-1 second-line term title-with-id title-with-id]|",
+		`<h2 id="second-line">`,
+		`<h2 id="example-hyperlink-in-a-header">`,
+		"|Identifiers: [a-a-a-a-a-a-c-c-c-c-c-c-c-c-d base-name base-name-1 example-hyperlink-in-a-header foo-something-bar foobar my-title my-title-1 second-line term title-with-id title-with-id]|",
 	)
 }
diff --git a/markup/goldmark/internal/render/context.go b/markup/goldmark/internal/render/context.go
index 469ea72e3..27029b670 100644
--- a/markup/goldmark/internal/render/context.go
+++ b/markup/goldmark/internal/render/context.go
@@ -1,4 +1,4 @@
-// Copyright 2024 The Hugo Authors. All rights reserved.
+// Copyright 2025 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import (
 	"sync"
 
 	bp "github.com/gohugoio/hugo/bufferpool"
+	east "github.com/yuin/goldmark-emoji/ast"
 
 	htext "github.com/gohugoio/hugo/common/text"
 	"github.com/gohugoio/hugo/tpl"
@@ -282,6 +283,7 @@ func textPlainTo(c ast.Node, source []byte, buf *bytes.Buffer) {
 	if c == nil {
 		return
 	}
+
 	switch c := c.(type) {
 	case *ast.RawHTML:
 		s := strings.TrimSpace(tpl.StripHTML(string(c.Segments.Value(source))))
@@ -290,6 +292,11 @@ func textPlainTo(c ast.Node, source []byte, buf *bytes.Buffer) {
 		buf.Write(c.Value)
 	case *ast.Text:
 		buf.Write(c.Segment.Value(source))
+		if c.HardLineBreak() || c.SoftLineBreak() {
+			buf.WriteByte('\n')
+		}
+	case *east.Emoji:
+		buf.WriteString(string(c.ShortName))
 	default:
 		textPlainTo(c.FirstChild(), source, buf)
 	}
diff --git a/markup/goldmark/toc_integration_test.go b/markup/goldmark/toc_integration_test.go
index 3b48dac6c..7ce2e8664 100644
--- a/markup/goldmark/toc_integration_test.go
+++ b/markup/goldmark/toc_integration_test.go
@@ -239,12 +239,12 @@ title: p7 (emoji)
 
 	// image
 	b.AssertFileContent("public/p3/index.html", `
-<li><a href="#an-image-kittenajpg">An image <img src="a.jpg" alt="kitten" /></a></li>
+<li><a href="#an-image-kitten">An image <img src="a.jpg" alt="kitten" /></a></li>
 `)
 
 	// raw html
 	b.AssertFileContent("public/p4/index.html", `
-<li><a href="#some-spanrawspan-html">Some <span>raw</span> HTML</a></li>
+<li><a href="#some-raw-html">Some <span>raw</span> HTML</a></li>
 `)
 
 	// typographer