A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
We appreciate your response. Based on the details that you've shared, we'd like to check the sync settings that's currently active in the OneNote application. To check this, you can perform the steps posted under the Turn automatic notebook synchronization back on section of this link.
Note: The Sync automatically whenever there are changes option is recommended to allow the OneNote application to automatically save new inputs in a notebook. We'd recommend using this option on the devices where you're using OneNote.
We look forward to an update on your concern.