Report Builder: Power BI measures behave differently in Report Builder Matrix Visualisation

[helloworld_]

I have to generate a paginated report for a matrix table. I've created dummy data as follows:

Table A (storing different hierarchies of fields):

Table B (storing comments in concatenated format):

The DAX formula I used to allow comments to be shown at specific level:

comments_measure = 
CALCULATE(
    MAX(comments[comments]),
    FILTER(
        comments,
        comments[selected] = SELECTEDVALUE('fact'[Alphabet])&SELECTEDVALUE('fact'[Food])
    ))

The results in Power BI looks like this:

However when I imported the same measure in Report Builder and created the matrix visual, I get the following results:

The comments for Level 1 (Alphabet) are not being reflected correctly.

Any idea to get this working correctly?