Autocorrect stopped being only a spellcheck in iOS 17, when Apple added a word-prediction model. That is why a word you spelled correctly gets changed, and why the switch people reach for is usually the wrong one.
Each Weather widget carries its own location, set on the widget rather than in the app or in Settings, so changing one changes nothing else. This sorts the fix by what you are actually seeing, including the one version that has no documented fix.
Apple’s own two pages disagree on how to drop the pin, and one of them gives a gesture that does not work. The setting that stops most downloads sits in a sheet you cannot reach from Settings at all.
Every photo carries two dates and the library sorts by one of them, which is why a picture taken years ago can land at today. The switch is one button in Photos, and there is a separate fix when the photo’s own date is wrong.
Apple has no iPhone guide page for this setting at all. Here is what it does, what it does not control, the middle option almost nobody picks, and the readers whose maker tells them to leave it alone.
Your app settings did not vanish, they moved into a row called Apps. That happened in iOS 18 rather than the update you just installed, and Apple has never announced it on a single consumer page.
Photo Shuffle gets the blame everywhere, and it is something you have to pick. A Focus swaps the entire Lock Screen instead, and it can fire when you arrive somewhere or open one particular app.
Swiping the card off your Lock Screen does not hide it, it ends it, and only the app can start another. Apple publishes no troubleshooting page for this, so the rules live in its developer documentation.
The controls that can silence a single person are not in the Notifications screen, and Apple documents them across four separate pages. One of them tells the sender. One of them cannot be detected at all.
Vibrate on Ring and Vibrate on Silent were replaced by one Haptics picker holding two options that are a single word apart. A switch in Accessibility overrides the lot, and Apple says it silences earthquake and tsunami alerts too.