diff --git a/src/EditorFactory.js b/src/EditorFactory.js
index 1a0c025cfd1..ca2f73b8110 100644
--- a/src/EditorFactory.js
+++ b/src/EditorFactory.js
@@ -84,20 +84,8 @@ const SerializeException = function(message) {
 	this.message = message
 }
 
-const serializePlainText = (tiptap) => {
-	const doc = tiptap.getJSON()
-
-	if (doc.content.length !== 1 || typeof doc.content[0].content === 'undefined' || doc.content[0].content.length !== 1) {
-		if (doc.content[0].type === 'codeBlock' && typeof doc.content[0].content === 'undefined') {
-			return ''
-		}
-		throw new SerializeException('Failed to serialize document to plain text')
-	}
-	const codeBlock = doc.content[0].content[0]
-	if (codeBlock.type !== 'text') {
-		throw new SerializeException('Failed to serialize document to plain text')
-	}
-	return codeBlock.text
+const serializePlainText = (doc) => {
+	return doc.textContent
 }
 
 export default createEditor
diff --git a/src/components/Editor.vue b/src/components/Editor.vue
index dada7de0a2d..3d624cdb77d 100644
--- a/src/components/Editor.vue
+++ b/src/components/Editor.vue
@@ -111,7 +111,7 @@ import { createEditor, serializePlainText, loadSyntaxHighlight } from './../Edit
 import { createMarkdownSerializer } from './../extensions/Markdown.js'
 import markdownit from './../markdownit/index.js'
 
-import { CollaborationCursor, Keymap } from '../extensions/index.js'
+import { CollaborationCursor } from '../extensions/index.js'
 import DocumentStatus from './Editor/DocumentStatus.vue'
 import isMobile from './../mixins/isMobile.js'
 import setContent from './../mixins/setContent.js'
@@ -371,8 +371,8 @@ export default {
 				filePath: this.relativePath,
 				forceRecreate: this.forceRecreate,
 				serialize: this.isRichEditor
-					? () => createMarkdownSerializer(this.$editor.schema).serialize(this.$editor.state.doc)
-					: () => serializePlainText(this.$editor),
+					? (content) => createMarkdownSerializer(this.$editor.schema).serialize(content ?? this.$editor.state.doc)
+					: (content) => serializePlainText(content ?? this.$editor.state.doc),
 				getDocumentState: () => getDocumentState(this.$ydoc),
 			})
 
@@ -526,16 +526,6 @@ export default {
 										clientId: this.$ydoc.clientID,
 									},
 								}),
-								Keymap.configure({
-									'Shift-Mod-c': ({ editor }) => {
-										if (!navigator?.clipboard) {
-											console.error('Clipboard API is not available')
-										}
-
-										const proseMirrorMarkdown = this.$syncService.serialize(editor.state.doc)
-										navigator.clipboard.writeText(proseMirrorMarkdown)
-									},
-								}),
 							],
 							enableRichEditing: this.isRichEditor,
 						})
diff --git a/src/extensions/Markdown.js b/src/extensions/Markdown.js
index 9ad6c7c503e..ba1b097003d 100644
--- a/src/extensions/Markdown.js
+++ b/src/extensions/Markdown.js
@@ -107,6 +107,9 @@ const Markdown = Extension.create({
 
 						return parser.parseSlice(dom, { preserveWhitespace: true, context: $context })
 					},
+					clipboardTextSerializer: (slice) => {
+						return createMarkdownSerializer(this.editor.schema).serialize(slice.content)
+					},
 					transformPastedHTML,
 				},
 			}),
diff --git a/src/tests/plaintext.spec.js b/src/tests/plaintext.spec.js
index cc7f6024615..fdd68fa0eb4 100644
--- a/src/tests/plaintext.spec.js
+++ b/src/tests/plaintext.spec.js
@@ -17,7 +17,7 @@ const plaintextThroughEditor = (markdown) => {
     enableRichEditing: false
   })
   tiptap.commands.setContent(content)
-  return serializePlainText(tiptap) || 'failed'
+  return serializePlainText(tiptap.state.doc) || 'failed'
 }
 
 describe('commonmark as plaintext', () => {