In Data collection → Templates, the "Linked templates" column for a parent template stays empty even though linked templates exist.

https://www.zabbix.com/documentation/current/en/manual/web_interface/frontend_sections/data_collection/templates

Steps to reproduce:

1. Create a new template (parent).
2. Link multiple templates to it and save.
3. Open the template list and check the Linked templates column for the parent.

Result:
The Linked templates column is empty.
After adding another linked template to a parent that previously showed links correctly, the column becomes empty as well.

Expected:
Linked templates are listed in the Linked templates column (as in Zabbix 7.0).