Linked entity and relationship lists inconsistent in knowledge tab

[Lhorus6]

Description

When in a Knowledge tab, the list view of relationships and linked entities is inconsistent depending on the relationship and its direction. See example in repro case.

Environment

6.4.5

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Create a Malware X
2. Create a Malware Y
3. Create a Malware Z
4. Create the relation "Malware X -> variant of -> Malware Y"
5. Create the relation "Malware Z -> variant of -> Malware X"
6. Go on Malware X > Knowledge tab > "Variants"
   -> You will see Malware Y and Z listed in the "entities list view" BUT you will see only the relation with Malware Y in the "relationships list view":

Expected Output

If I see two malware in the list, I should have at least two relationships