Part of my breadcrumbs is missing

I was successful in making my breadcrumbs to show.

However, I have an issue:

The breadcrumb will show only the 1st and the child. Let me give an example;

Click on Home
Click on Topic 1
Click on Subtopic 1

My breadcrumbs show home -> Subtopic 1

Doesn't show Topic 1

How can I fix this?

Thank you for the help