Sluggy Emergency Pants

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.