Sounds to me like it's an app issue. I wrote to Google Books and here is the reply that they gave me:
Hello XXXX,
Yes, I remember your previous email. Unfortunately, we've been having
issues with the Bible, as books with long chapters take awhile to load and
the Bible in particular has extremely long chapters.
I apologize for the frustrating experience. Our technical staff is aware
of this issue and is working to fix it in future app versions. The next
app version should fix some of these loading issues, but unfortunately the
Bible is such a long chapter that I'm not sure it will fix the Bible's
loading issue.
Again, I'm so sorry about this issue. If you would like to request a
refund, please click on the link below:
Thank you for your continued interest in Google eBooks.
Sincerely,
Anna
The Google Books Team