I decided to try reading aloud and used M Lloyd-Jones Ephesians series (vol 4: Christian Unity). I began reading the article which begins on p 241 ("Speaking the Truth in Love"). As I scrolled down to follow the speaking voice, the speech addin stopped. Restarting began at the top of the page. This happens no matter where I have the cursor, and whether or not I have text selected. (This is not how it worked in version 3.)
If I pause and then scroll, the reading button also disappears.
Please allow scrolling a text while reading it aloud.
I do notice that when reading the Bible the focus shifts to the current verse, eventually shifting the text as well. In doing this with the Lloyd-Jones example above, I find that the text shifts to the top of the screen when the page number changes. This is fine if a whole page fits on a screen, but when it doesn't, one can't follow the reading.
I'm not sure this is working as intended.