Custom Section Permissions OneNote Class Notebook

Here’s the thing…

We use Teams for Education, and this question is regarding the associated OneNote Class Notebook.

I have a requirement to hack the notebook so that I can grant access to other accounts to specific student section groups. By following these instructions (https://blog.thenetw.org/2018/06/18/protip-assigning-section-level-permissions-in-onenote/#comment-1666) it works a treat!

However,, it doesn’t last. After running an audit, I have seen that the ‘SharePoint App’ removes these custom permissions a couple of hours after I create them…

This screenshot is from Share-Gate

Does anyone have any thoughts on how I can make these permissions stick?

Very many thanks