Without a custom script, your template (e.g., a DOCX file) must follow the proper notation for field names.
Field names need to be written with CamelCase or using underscore _. If you write a field name with any other characters, including white spaces, data for that field is not rendered.
Examples:
LastName
last_name
Last_Name
last_Name
Last Name
last-name
By default, the recursion level is set to a minimum of 3. The recursion works as follows:
root record = 1
subtable in root = 2
another table within the subtable = 3
etc.
Either leave the recursion level set to its default or consider increasing the number of recursions, based on your needs.