When I try to do a search for a specific word on a pdf book, it used to find it and highlight the word, but it isn't doing it anymore. When you do a search for a word, it brings you to the page without highlighting your word. This extremely frustrating because you have to read the whole page to find it, and sometimes highly inaccurate. This started happening recently, and I thought it was justa problem with certain files, but all of them act the same way know, even ones that were working fine before. My iphone is updated and the app too, why is this happening?