If old conversations are appearing as recent in the iMessage app on your iPhone, it's possible that there is a syncing issue between your iPhone and iCloud. Here are a few things you can try to fix the issue:
- Force close the iMessage app: To force close the iMessage app, swipe up from the bottom of the screen and pause in the middle of the screen until the App Switcher appears. Then, swipe left or right to locate the iMessage app and swipe it up to close it. After that, reopen the iMessage app and check if the issue is resolved.
- Sign out and sign in to iCloud: Go to Settings > [your name] > iCloud, and then scroll down to find the "iCloud Backup" option. Turn it off and wait for a few seconds. Then turn it on again and check if the issue is resolved.
- Turn off iMessage in iCloud: Go to Settings > [your name] > iCloud > Manage Storage, and then tap on "iMessage." Next, turn off the "Messages" option, and then turn it back on again. This will re-sync your messages with iCloud, and the issue should be resolved.
- Update to the latest version of iOS: Sometimes, issues with iMessage can be resolved by updating to the latest version of iOS. Go to Settings > General > Software Update to check if there is an update available.
Contact Apple Support: If none of the above solutions work, you can contact Apple Support or visit an Apple Store for further assistance.
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