Switching Epub urls causes pageChanged callback to return currentPage as -1

[abdulwahabone]

Background
On my Epub App, I am switching between epubs. I need to get current page and total page on load to show it on my navigation. To get the total page and current page, I am using pageChanged callback on the EpubViewer.

Issues

1. The pageChanged callback sometime returns currentPage as -1 and total page as 0 and I cant use that on my navigation.
2. CurrentPage is sometimes 0, not sure if this is a bug or that just how epubs are.

To Reproduce
I have created a codesandbox demo

1. Go to the demo link on incognito, make sure cache/localstorage is clear.
2. Change Epubs using the change epub button.
3. Notice that current page is sometimes -1 and total page is 0.
4. You can also check the console to see the complete object returned from pageChanged callback.

Screenshot 1	Screenshot 2

Issue is happening across all devices and browsers

[altmshfkgudtjr]

Thanks for your interest in our library.

In my environment, Total Page appears as 0, so it seems that it is not well reproduced.
I need to spend some more time checking it out.