safari downloads on iphone 16 Pro iOS 18.16.2 aren’t saving to selected folder in files app

Fix it by:

1. Reassigning the folder (Settings → Safari → Downloads → Other)
2. Resetting download location
3. Checking Files & Folder permissions
4. Avoiding Google Drive/OneDrive/Dropbox as download targets
5. Avoiding shared folders
6. Testing “On My iPhone → Downloads”

These steps reliably fix the issue for almost everyone.