I don’t understand why Apple can’t fix this problem since it seems to randomly happen in many of their apps such as reminders, notes, messages, photo. etc. and to many users.The fix that always seems to be suggested is to sign out/in of your apple account or turn off/onsyncing in the effected app. Neither is a good experience. A very old technology like imap seems to have reliably addressed syncing with email, why can’t Apple do the same?