I password protected some text within a note, and viewed and edited that text successfully (many times). A "dot bar" would appear within the note, signifying that there was protected text, and when I would click on the dot bar I would be prompted for the password. Then, one day I accidentally backspaced over the "dot bar" - and all my protected text is gone! Apparently, the dot bar is not just a prompt to input a password but is the only link to the protected text !! And, since the whole note was not erased, the lost text is not in the Trash. If anyone knows how to recover this text, please let me know.