diff --git a/install/package.json b/install/package.json
index 7de45c258e..f475bab278 100644
--- a/install/package.json
+++ b/install/package.json
@@ -103,7 +103,7 @@
         "nodebb-plugin-dbsearch": "6.2.5",
         "nodebb-plugin-emoji": "6.0.1",
         "nodebb-plugin-emoji-android": "4.1.1",
-        "nodebb-plugin-markdown": "13.0.0-pre.9",
+        "nodebb-plugin-markdown": "13.0.0-pre.10",
         "nodebb-plugin-mentions": "4.6.10",
         "nodebb-plugin-spam-be-gone": "2.2.2",
         "nodebb-plugin-web-push": "0.7.0",
diff --git a/src/activitypub/mocks.js b/src/activitypub/mocks.js
index 41a60f24ad..f6b237f850 100644
--- a/src/activitypub/mocks.js
+++ b/src/activitypub/mocks.js
@@ -177,7 +177,10 @@ Mocks.post = async (objects) => {
 		let edited = new Date(updated);
 		edited = Number.isNaN(edited.valueOf()) ? undefined : edited;
 
-		if (content && content.length) {
+		const sourceContent = source && source.mediaType === 'text/markdown' ? source.content : undefined;
+		if (sourceContent) {
+			content = null;
+		} else if (content && content.length) {
 			content = sanitize(content, sanitizeConfig);
 			content = await activitypub.helpers.remoteAnchorToLocalProfile(content);
 		} else {
@@ -190,7 +193,7 @@ Mocks.post = async (objects) => {
 			// tid,  --> purposely omitted
 			name,
 			content,
-			sourceContent: source && source.mediaType === 'text/markdown' ? source.content : undefined,
+			sourceContent,
 			timestamp,
 			toPid,
 
diff --git a/src/activitypub/notes.js b/src/activitypub/notes.js
index cb2a7800c9..ac238b4bf1 100644
--- a/src/activitypub/notes.js
+++ b/src/activitypub/notes.js
@@ -179,6 +179,7 @@ Notes.assert = async (uid, input, options = { skipChecks: false }) => {
 				timestamp,
 				tags,
 				content: mainPost.content,
+				sourceContent: mainPost.sourceContent,
 				_activitypub: mainPost._activitypub,
 			}),
 			Notes.updateLocalRecipients(mainPid, { to, cc }),
diff --git a/src/posts/create.js b/src/posts/create.js
index 8833593b32..874971d501 100644
--- a/src/posts/create.js
+++ b/src/posts/create.js
@@ -16,7 +16,7 @@ const isEmojiShortcode = /^:[\w]+:$/;
 module.exports = function (Posts) {
 	Posts.create = async function (data) {
 		// This is an internal method, consider using Topics.reply instead
-		const { uid, tid, _activitypub } = data;
+		const { uid, tid, _activitypub, sourceContent } = data;
 		const content = data.content.toString();
 		const timestamp = data.timestamp || Date.now();
 		const isMain = data.isMain || false;
@@ -30,7 +30,7 @@ module.exports = function (Posts) {
 		}
 
 		const pid = data.pid || await db.incrObjectField('global', 'nextPid');
-		let postData = { pid, uid, tid, content, timestamp };
+		let postData = { pid, uid, tid, content, sourceContent, timestamp };
 
 		if (data.toPid) {
 			postData.toPid = data.toPid;
diff --git a/src/topics/create.js b/src/topics/create.js
index 40b85ee5c0..2d06d22123 100644
--- a/src/topics/create.js
+++ b/src/topics/create.js
@@ -100,7 +100,7 @@ module.exports = function (Topics) {
 		await Topics.validateTags(data.tags, data.cid, uid);
 		data.tags = await Topics.filterTags(data.tags, data.cid);
 		if (!data.fromQueue && !isAdmin) {
-			Topics.checkContent(data.content);
+			Topics.checkContent(data.sourceContent || data.content);
 			if (!await posts.canUserPostContentWithLinks(uid, data.content)) {
 				throw new Error(`[[error:not-enough-reputation-to-post-links, ${meta.config['min:rep:post-links']}]]`);
 			}
@@ -186,7 +186,7 @@ module.exports = function (Topics) {
 
 		if (!data.fromQueue && !isAdmin) {
 			await user.isReadyToPost(uid, data.cid);
-			Topics.checkContent(data.content);
+			Topics.checkContent(data.sourceContent || data.content);
 			if (!await posts.canUserPostContentWithLinks(uid, data.content)) {
 				throw new Error(`[[error:not-enough-reputation-to-post-links, ${meta.config['min:rep:post-links']}]]`);
 			}