Not all notes are being exported

In order to make copies of my content for safety reasons, I exported certain notebooks. But now, not even half of the content is being exported. Why not? If I cannot save or auto-save everything, I definetly need another app since I work a lot with notes.

And also, I can only export on my WIndows laptop, not on my iPad or Android Smartphone. Makes me really worried about my content. Is that a really huge bug or intentionally?

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Migrate your Notebook data to the new, mobile Notebook.
Zoho Notebook is transforming. The new version will include exciting new features and a completely new user experience. The initial version will be mobile based, available for Android and iOS. A new web version will be available after the initial mobile release. With the release of the new Notebook approaching, we're migrating most of your current data to the new version. Once the new version is released, there will be an additional window to migrate your data. We will not provide access to the