If the IM stranger's nickname and avatar have changed and the conversation cannot be updated, here are some steps you can take:
Refresh the Conversation: Sometimes, simply refreshing the chat window or app can update the displayed information.
Check for Updates: Ensure that both you and the stranger are using the latest version of the messaging app.
Clear Cache: Clearing the app's cache can sometimes resolve issues with outdated information.
Re-initiate the Conversation: If the above steps don't work, try starting a new conversation with the stranger. This might fetch the latest information.
Contact Support: If the issue persists, consider reaching out to the support team of the messaging app.
If you're using a cloud-based messaging service, ensure that your service provider offers robust backend support for real-time updates. For instance, Tencent Cloud offers various services that can help in managing real-time data and user information updates efficiently. Their solutions can ensure that changes in user profiles are reflected promptly across all connected clients.
By following these steps, you should be able to resolve the issue with the updated nickname and avatar not reflecting in your conversation.