Describe the bug
When I'm opening my epub, the position is at the top, I'm moving down and the epubcfi is always the same: the end of the epub.

To Reproduce
Steps to reproduce the behavior:

1. Open the epub,
2. Just scroll it a little and print the epubcif
3. The epubcif is always the same for the book.

Expected behavior
I want to have the real epubcif in function of where i am in the book.

Screenshots
The error is here:

Smartphone (please complete the following information):

• Device: PC
• OS: Windows
• Version 11