diff --git a/infra/relay/src/agentActivity/ApnsClient.test.ts b/infra/relay/src/agentActivity/ApnsClient.test.ts
index 81e76b0391aa..f06c75198271 100644
--- a/infra/relay/src/agentActivity/ApnsClient.test.ts
+++ b/infra/relay/src/agentActivity/ApnsClient.test.ts
@@ -151,7 +151,7 @@ describe("ApnsClient", () => {
       const environmentId = "é".repeat(191);
       const threadId = "t".repeat(512);
       const notification = sanitizeApnsNotificationPayload({
-        title: "界".repeat(120),
+        title: "😀".repeat(120),
         body: "界".repeat(120),
         environmentId,
         threadId,
@@ -159,6 +159,8 @@ describe("ApnsClient", () => {
       });
       const request = apns.makePushNotificationRequest({ token: "push-token", notification });
 
+      expect(notification.title).toBe(`${"😀".repeat(58)}...`);
+
       expect(
         new TextEncoder().encode(JSON.stringify(request.payload)).byteLength,
       ).toBeLessThanOrEqual(4096);
diff --git a/infra/relay/src/agentActivity/agentActivityPayloads.ts b/infra/relay/src/agentActivity/agentActivityPayloads.ts
index 4195c8117180..2dd8be5870b9 100644
--- a/infra/relay/src/agentActivity/agentActivityPayloads.ts
+++ b/infra/relay/src/agentActivity/agentActivityPayloads.ts
@@ -52,7 +52,12 @@ export function truncateText(value: string, maxLength: number): string {
   if (trimmed.length <= maxLength) {
     return trimmed;
   }
-  return trimmed.slice(0, maxLength - 3).trimEnd() + "...";
+  return (
+    trimmed
+      .slice(0, maxLength - 3)
+      .replace(/[\uD800-\uDBFF]$/, "")
+      .trimEnd() + "..."
+  );
 }
 
 function sanitizeDeepLink(value: string): string {