Q: voice over error

I have noticed that this sometimes depends on the PDF. Some PDF's will read the whole article and others will stop at each line. One workaround I have found is settings > general > accessibility > speech > speak screen. Keep VO on as well. Using opening a PDF in iBooks as an example, open a PDF in iBooks and swipe down from the top of the screen with two fingers. You should then hear the PDF read aloud. -AJ

VoiceOver should also read the whole page if you flick up with two fingers in a pdf in iBooks.  This works if you only want VoiceOver on. -AJ

Try calling the Apple accessibility number: https://www.apple.com/support/accessibility/contact/