While trying to view the list of sections that can be added to a guide, the list has no scroll bar and is truncated (clipped).
The clipping isn't obvious in the first screenshot (not scrolled)

But if you try to scroll up to see additional sections, "Systematic Theologies" is clipped, and the rest of the list does not appear.

This issue appears to be affected by the window height, and less of the list is available as the program's window becomes shorter. Here the list is truncated at "SoundFaith" and you can't see "Systematic Theologies" when trying to scroll further.

7.7 SR-1 (7.7.0.0018) on macOS 10.12.5 (16F73)