[#14056] - Report with Groups: Group-Calculation (sum) invalid in before pagebreak

I have created a report with two groups using group-sums . The last group-sum before the pagebreak shows the wrong value.

All group-calculations (sum) are correct - except the last one. This happens when the report places the group-footer for the 1st group on the next page - in this case the group-calculation of the last group is wrong.

The group values for the yearweek group should be as follows:

2022/01 10
2022/02 35
2022/03 60
2022/04 85
2022/05 20

But when the report produces a page-break placing only the groupFooter on the next page - the last group reads like this:

2022/05 85 <- displays the value from the prevous group.

Executing the attached report in the Tibco JaspersoftStudio 6.18 will show the described error every time - The Report-Data itself is provided within the select-statement (use an MYSQL-Datasource).

- Changing band-height will solve the this problem
- Changing number of data-rows will solve the this problem

But the problem underneath remains ... only the case to reproduce the prodlem will be different.