At our university some teachers created content with Lessons (you can see an example attatched). They exported the content and another teacher imported it in another site.
The result was that the content it's imported well, but the chapters don't appear in the original order.
Later, we have done some tests about that and some times the order was respected and some times wasn't.
We've found that in the items of the imported pages, the sequence field is 1 in all the registers of the table LESSON_BUILDER_ITEMS, we thought this is the raison of the random order in the content.
We don't know whether the error is in exporting or in importing the content.