
A serious bug in the iOS 15 Messages app can cause some saved photos to be deleted, according to multiple complaints we've heard from MacRumors readers and Twitter users.

If you save a photo from a Messages thread and then go on to delete that thread, the next time an iCloud Backup is performed, the photo will disappear.
Even though the image is saved to your personal iCloud Photo Library, it appears to still be linked to the Messages app in iOS 15, and saving it does not persist through the deletion of the thread and an iCloud backup.
To replicate this bug, the following steps must be taken:
- Save a photo from a Messages conversation to your Camera Roll.
- Check to see that the photo has been saved.
- Delete the Messages conversation the photo came from. The photo will still be in your iCloud Photo Library at this point.
- Perform an iCloud Backup, and the photo disappears.
Until this bug is fixed, if you've downloaded photos from the Messages app, you'll want to make sure to keep those Messages conversations and not delete them to prevent them from being automatically removed from your devices.
(Thanks, Chad!)
Article Link: iOS 15 Messages Bug Causes Saved Photos to Be Deleted