[Bug] Entering Split View causes EPUB not to focus on a single plage

[AlvaroFranco]

Describe the bug

I have detected an issue when reading EPUBs. If you enter Split View mode on the iPad, the navigator displays two half-turning pages instead of focusing on a single page. This can also be reproduced by changing the size of the Split View window.

I have attached a video showing the issue

r2.mp4

How to reproduce?

1. Open an EPUB on iPad
2. Enter Split View mode
3. Change Split View window size

Readium version

2.7.4

OS version

iOS 18.1

Testing device

iPad Air 11

Environment

Additional context

No response