diff --git a/packages/core/src/message-editor/content.test.ts b/packages/core/src/message-editor/content.test.ts
index c7aac6c249..d67a4401af 100644
--- a/packages/core/src/message-editor/content.test.ts
+++ b/packages/core/src/message-editor/content.test.ts
@@ -6,6 +6,7 @@ import {
   xmlToContent,
   xmlToPlainText,
 } from "./content";
+import { buildGithubRefPlaceholderChip } from "./githubIssueChip";
 
 describe("xmlToContent", () => {
   it("parses a file tag into a file chip", () => {
@@ -97,6 +98,26 @@ describe("xmlToContent", () => {
     );
   });
 
+  it("serializes an unresolved github_pr placeholder chip with an empty title", () => {
+    const content: EditorContent = {
+      segments: [
+        {
+          type: "chip",
+          chip: buildGithubRefPlaceholderChip({
+            kind: "pr",
+            owner: "org",
+            repo: "repo",
+            number: 71827,
+            normalizedUrl: "https://github.com/org/repo/pull/71827",
+          }),
+        },
+      ],
+    };
+    expect(contentToXml(content)).toBe(
+      '<github_pr number="71827" title="" url="https://github.com/org/repo/pull/71827" />',
+    );
+  });
+
   it("round-trips a github_pr chip", () => {
     const content: EditorContent = {
       segments: [
diff --git a/packages/core/src/message-editor/content.ts b/packages/core/src/message-editor/content.ts
index 8bdf35b75b..4e03bebb0c 100644
--- a/packages/core/src/message-editor/content.ts
+++ b/packages/core/src/message-editor/content.ts
@@ -21,6 +21,9 @@ export interface MentionChip {
   skillName?: string;
 }
 
+/** Chip title shown while a pasted GitHub ref's real title is being fetched. */
+export const GITHUB_REF_PLACEHOLDER_TITLE = "Loading...";
+
 export interface FileAttachment {
   id: string;
   label: string;
@@ -83,7 +86,9 @@ export function contentToXml(content: EditorContent): string {
       case "github_pr": {
         const labelMatch = chip.label.match(/^#(\d+)(?:\s*-\s*(.*))?$/);
         const number = labelMatch?.[1] ?? "";
-        const title = labelMatch?.[2] ?? "";
+        const rawTitle = labelMatch?.[2] ?? "";
+        // A chip sent before its title fetch resolves must not leak the placeholder
+        const title = rawTitle === GITHUB_REF_PLACEHOLDER_TITLE ? "" : rawTitle;
         return `<${chip.type} number="${escapeXmlAttr(number)}" title="${escapeXmlAttr(title)}" url="${escapedId}" />`;
       }
       default:
diff --git a/packages/core/src/message-editor/githubIssueChip.ts b/packages/core/src/message-editor/githubIssueChip.ts
index 76b1026573..99b91a8c20 100644
--- a/packages/core/src/message-editor/githubIssueChip.ts
+++ b/packages/core/src/message-editor/githubIssueChip.ts
@@ -1,5 +1,5 @@
 import type { GithubRefState } from "@posthog/shared";
-import type { MentionChip } from "./content";
+import { GITHUB_REF_PLACEHOLDER_TITLE, type MentionChip } from "./content";
 import type { ParsedGithubIssueUrl } from "./githubIssueUrl";
 
 export interface GithubIssueChipSource {
@@ -43,7 +43,7 @@ export function buildGithubRefPlaceholderChip(
 ): MentionChip {
   const source = {
     number: parsed.number,
-    title: "Loading...",
+    title: GITHUB_REF_PLACEHOLDER_TITLE,
     url: parsed.normalizedUrl,
   };
   return parsed.kind === "pr"