My notes keep disappearing! Some of them are notes I had for months, even years and out of the blue they were gone. That is the second main issue I've been having with this app. The main one is the fact OneNote does not offer an "Undo" option. Any sentence or paragraph accidently deleted in a particular note cannot be recovered and is gone for good. I think it is time for me to look elsewhere for a more reliable note taking app.