Hi there! I understand you're seeing blank WhatsApp conversations on your iPhone 13 Pro when using the Messenger Duo app. Let's get this sorted out together.

To start, could you tell me if this issue happens with all chats or just specific ones? Also, have you tried any troubleshooting steps so far, like restarting the app or your phone?

Meanwhile, here are some effective steps you can try:

1. Force Close and Reopen the App
Sometimes the app might glitch briefly. Swipe up (or double press home button) to close Messenger Duo, then open it again.

2. Check for App Updates
Open the App Store, go to Updates, and see if there's an update available for Messenger Duo. Updating fixes many bugs.

3. Ensure iOS is Up to Date
Go to Settings > General > Software Update and verify your iPhone 13 Pro has the latest iOS version.

4. Clear Cache or Temporary Data (If Applicable)
Messenger Duo might have a cache clearing option within its settings. If yes, clear it to remove corrupted temporary files.

5. Backup Your WhatsApp Chats
Before deeper steps, back up your chats via WhatsApp settings to iCloud.

6. Reinstall Messenger Duo
Delete Messenger Duo and reinstall it from the App Store. After reinstalling, log in again.

If these steps don’t fix the blank conversations, please let me know. We can then explore advanced settings or check for possible server issues.

Are you satisfied with the solution I provided so far?