BUG: Matrix row hierarchy, field parameter with measure no longer works

[bhalicki]

In the past I have created a field parameter with measures to allow the matrix visualisation to update row headers dynamically.  For example:

BudgetParameter =

VAR year_0 = [CurrentYear] & " Budget" // eg "2025 Budget"

VAR year_1 = [NextYear] & " Budget" // eg "2026 Budget"

RETURN

{

    (year_0 , NAMEOF('_Measures'[BudgetTotalsYear0]), 0),

    (year_1 , NAMEOF('_Measures'[BudgetTotalsYear1]), 1)

}

I then include this as a row in matrix, drill down, and the headers will automatically update as the year rolls over.

This worked in the past.

For some reason, now I can no longer add a measure into a field parameter, drill down and have the row displayed. The row just doesn't display. If I reference the table/column directly, no problem.

I have tried June 2025 -> September 2025 editions and the problem persists.