Hi, guys. I have put my smart phone manual as a text file into my books folder. I have edited it so that the name and author are there. I have used control F to find the chapters and have held down eight to mark them. I notice that as I press seven and nine, it never says the name of the mark, i.e. chapter 6, chapter 7, etc. Once, as I was moving backwards with the seven key, I heard it say a few of the chapters, but it is inconsistent and most of the time remains silent. Is this a known bug or am I doing something wrong? Thanks.