Create a link using the following syntax:
[[Bible:Ge 25:8]]
Compile the PBB and then hover over that link in the resulting book. The popup is duplicated.
Here's the source document in Word:

Here's the resulting book, with mouse hovering over that link:

Notice the popup has the link duplicated.
A question while I'm at it: how come no popup preview of the Bible text at that location comes up in a PBB Cross-Reference Index? It works in the New Treasury of Scripture Knowledge. Do I need to put some sort of tag in to get this to work? Is it even supported? Or is this a bug?
