Issue with border lines in a matrix report

问题

I have a requirement to display the Product name and the related Amount in a report grouped by each CategoryId (no need to show categoryId in the report, only used in grouping) as shown below.

Below are the design steps.

1. Added a matrix with 2 rows and a column grouping by CategoryId

   

2. In the first row of matrix, added a tablix with 2 columns (Product and Amount) and row grouping on Product.

   

3. In the second row of matrix, added a tablix with 2 rows (Subtotal and GrandTotal) and 2 columns (Product and Amount)

   

However, I am getting the result below where there is an empty space if the Product count under categories is mismatching.

Expectation is the border lines should be displayed even there is no data.

Please suggest any fix or any alternative design of the report.

来源：https://stackoverflow.com/questions/65253136/issue-with-border-lines-in-a-matrix-report