Problem with the generated code for many to one property

[jmarq143]

I have this generated code for a table called products created by the ES 2019 studio.
The table products has a many to one relationship with a table called categories.

I want to be able to access the name of the category from product.
So I am doing product.categories.category_name
But when I step through the code in the generated file:, I never seem to reach the part where it loads the Categories.

The generated code in 2019 looks like this:

Is this a bug? Is there some other way I need to be doing this?

I think the problem is with this line:
if(this._Categories == null && CategoryId != null)

This is causing it to never go in to that if block since we have already initialized this._Categories just before that:
this._Categories = new Categories();

In 2009 version it used to work fine.
The code in 2009 like this:

Please let me know if anyone have any solution for this. Thank you!