Bug where xref links for missing books point to current book instead

In our scripture app, parallel passages are listed under section headings. Since the app currently only has PORTIONS of the NT, there are parallel passage links listed that are not currently in the app. (For example, Mark and Luke are done, but Matthew and John are not.)

But if I touch the reference for Mat. 3:1-12, say, the reference will open up at the bottom of the screen showing MARK 3:1-12.

It would be better if the reference window opened with “Reference not found”.