When you listen to a lesson, in synchronized text view, it highlights the text in bold. In addition the window is scrolled to that place of the text automatically.
But the highlighted text and the voice in audio does rarely match, like first sentence is highlighted while the voice reads the 15th sentence. And it's annoying when the windows is scrolling up automatically.
I think you should just discard the automatic scrolling part, because the highlighted text and audio doesn't match anyway. It's just annoying, it makes it very difficult to read the text while listening to the audio.