Setup
I have NASB95 as the primary Bible open at the left with the Afrikaans Nuwe Vertaling Bible as a secondary resource in the Multiple Books Display at the right.

Issue
Why does the Afrikaans Nuwe Vertaling at the right display all highlights although only one of my "Notes and Highlights" notebooks "Cross-References" (Kruisverwysings) is selected for NASB?
Background
The Afrikaans Nuwe Vertaling Resource displays correctly when opened by itself. My Notes are linked to References (Luke 1:26 and 27).
Expected Behavior
When working in Multiple Books Display the expected behavior is to see the same highlights in the secondary resource as in the primary resource to compare them in both.