Sure security is important but integrity is too.
* iTunes/Music app randomly reassign my Album artwork, with different (incorrect) art showing up on different devices!
* Reminders app: shared reminder lists can end up with the name of a different list
* Ghost photos that are deleted from my phone, and come back later.
* Maps, when I say "navigate to $friend" set a route that ended in my own driveway.
To me, these bugs suggest a fundamental design flaw, perhaps they are using a simple Integer as an index rather than a UUID?
Or maybe the database schema are solid, but there's some sort of race condition in their synchronization frameworks and the data is getting scrambled in RAM?
Whatever it is, it's absolutely insane that in 2025 these kinds of bugs are happening.
* prompts in settings for adding an account recovery contact that never go away, even after months and months of successfully setting it up multiple times.
* OS account profile picture can barely stay associated with the most recently picked option. Happens for non-iCloud local accounts on Mac, happens when I change profile pictures on iOS for iCloud… weird.
* OS account update screens on iPad, iOS, and watchOS will forget that they are in the middle of updating if you navigate away from the settings screen. Thankfully, today they at least recover from it (it’s probably still happening in the background), but it takes several long seconds of spinning for the settings page to remember that it was doing an update two seconds ago before I navigated away from it.
* similar to your ghost pictures bug, deleting a large media file from a media player app moves it to recently deleted, but you can sometimes end up in situations where you can’t permanently delete the file, or it doesn’t show up anywhere but still takes up space. (Talking about 20GB-80GB file sizes where it makes a big difference on OS storage space)
Some of these bugs have been around for a VERY long time.
But the weird thing is I don’t see them in 3rd party apps.