Bug: Marix-View does not combine parents / grandparents correctly

[Pummelfisch]

Description of the Bug

I have noticed that in v4 in the matrix view often the parents and grandparents do not combine correctly into one Parent / Grandparent, if there are multiple paths of the parent / grandparent. That results in two or more shown parents of the current note with duplicates of the parents.

Here is one example (sorry for the german text, but as you can see there are three mentions of "Mehrdimensionale Abbildungen" and 2 of "Metrische Räume" in the matrix view.

If you follow the breadcrumbs in that matrix view you can see that this split already occurs earlier, as the grandparent "Vektoranalysis MOC" is split.

Reproduction

Steps to reproduce the behavior:

1. Create Notes with hirarchy similar to this image:

2. Notice that "Test MOC - 31" is mentioned two times, instead of once

Expected behavior

I would expect that one parent is only mentioned once in the matrix view. Maybe even in a way like this sketch. I have marked the critical area that would allow this to be still including all grandparents

Desktop (please complete the following information):

• OS: Linux
• Breadcrumbs version: 4.2.35-beta
• Obsidian version: 1.7.7