Notes are missing
Notes were deleted
If a Note was deleted from the Fastmail interface, you can immediately click Undo or use Ctrl + Z on your keyboard to restore it.
On the Fastmail mobile app, tap More at the bottom right of the screen and then tap Undo to restore the note.
Notes deleted in the last 7 days can be restored from the Settings → Restore screen.
A known issue with Apple Notes
A few users of Apple Notes reported that all of their Notes went missing, and we had no record of their Notes in backups. Unfortunately, this seems to be a general issue with Apple Notes, particularly when the iOS version is updated. If the device hasn't properly shared the data to Fastmail or back to the Apple iPhone/Mac desktop, then the Notes are not saved to our server on the device, and they go missing as if they were never saved at all.