Hi all, i have a question in regards to insight custom fields. Here is my problem. I have a schema with two object types: Category and Subcategory. In Category object type i hold Subcategory objects as references to the Subcategory object type.

i've also set up a customer form with two insight custom fields: Category and subcategory.

Now what i would like to achieve is to filter the Subcategory custom field on what was selected in the Category custom field.
What i have tried is
1. hardcoded the name of the inbound reference object - it worked and displayed 3 results as it should

2. Used a placeholder instead of a hardcoded value in filter issue scope (IQL) and pointed to the Category custom field which is customfield_10043 - didn't work

3. tried to use smartvalue instead of the placeholder which didn't work either
4. tried a few more variants with outR without any luck.
Checked this questions on community but the were not for my use case
How to configure Insight custom fields as cascading select list | Jira | Atlassian Documentation
Announcing Filter Issue Scope for Insight - Atlassian Community
Any help?
Thanks