I imported 4-5 ebooks the other day with no problems. This morning I tried importing another 2-3 and only 1 lesson was generated for each. I kept waiting for the other lessons to generate but 12 hours later and I was still looking at just 1 lesson.
Thanks for reporting! We are familiar with the issue and our developers are looking into it. We will have it fixed. Thanks for your patience!
I’ve been having this problem too. Normally they appear after some time but it has been several days and the remaining parts of the Ebooks have not appeared.
It’s fixed now, but you will need to re-import the book again.