Using the NLS Ereader as a braille display with the iPhone and an issue with the Kindle app.

Hi all, I hope this is the correct forum to post this in. I’m not sure if this is an issue with all braille displays or just the NL SE reader one that I am using. When I am reading on the Kindle app, at the end of every page or so I am losing focus. It skips paragraphs and I have to go backwards to catch up with what I am trying to read. It’s very annoying and I was just wondering if anyone else has experienced this issue and if there’s any way to fix it.