diff --git a/Tests/LibWeb/Ref/reference/textnode-segmenter-invalidation.html b/Tests/LibWeb/Ref/reference/textnode-segmenter-invalidation.html
new file mode 100644
index 00000000000..bccaed44b69
--- /dev/null
+++ b/Tests/LibWeb/Ref/reference/textnode-segmenter-invalidation.html
@@ -0,0 +1,2 @@
+<!DOCTYPE html><textarea>a
+b</textarea>
diff --git a/Tests/LibWeb/Ref/textnode-segmenter-invalidation.html b/Tests/LibWeb/Ref/textnode-segmenter-invalidation.html
new file mode 100644
index 00000000000..d1088abb205
--- /dev/null
+++ b/Tests/LibWeb/Ref/textnode-segmenter-invalidation.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<head><link rel="match" href="reference/textnode-segmenter-invalidation.html" /></head>
+<textarea id="output"></textarea>
+<script>
+    document.addEventListener('DOMContentLoaded', () => {
+        document.body.offsetWidth  // Force layout
+        document.getElementById('output').value = 'a\nb';
+    });
+</script>
diff --git a/Userland/Libraries/LibWeb/Layout/TextNode.cpp b/Userland/Libraries/LibWeb/Layout/TextNode.cpp
index e015b4aa34d..6030a81ce51 100644
--- a/Userland/Libraries/LibWeb/Layout/TextNode.cpp
+++ b/Userland/Libraries/LibWeb/Layout/TextNode.cpp
@@ -304,6 +304,7 @@ static ErrorOr<String> apply_text_transform(String const& string, CSS::TextTrans
 void TextNode::invalidate_text_for_rendering()
 {
     m_text_for_rendering = {};
+    m_grapheme_segmenter.clear();
 }
 
 String const& TextNode::text_for_rendering() const
