There's an issue with the quick-jump for the chapters not in
books.
When you scroll down the list of chapters, the list of
sub-chapters also scrolls. That is to say: after you scroll down in
the chapter drop-down list and click on a chapter, you see what's
left over at the bottom of the sub-chapter menu - sometimes the
last subchapters and sometimes nothing but gray background.
To see the problem, try to jump to a subchapter in chapter 60.
nothing but gray. then, go back into the drop-down. scroll down so
that oceans unmoving is at the very bottom of the pane, then click
on it. there, you only see the last subchapter, double cross.
I have no idea how to fix it.