Error in Sender IPhone WhatsApp Application

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The Problem:
When a user scans a WhatsApp QR code on iPhone, the message is delivered successfully to the recipient, but the sender's iPhone WhatsApp app fails to display which phone number was used to send the message via the QR code scanning feature.

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A user is experiencing a problem where they cannot send or receive WhatsApp messages today (4 June 2026) unless they have a saved contact number. Messages fail when the recipient is not in their phone's contact list.