Dynamic Baseline on Report Studio 8.2

[o15112002]

Hi all,
i have a big problem. i made a report which include a bubble chart. And I'm trying to draw baseline as horizontal and vertical. And each baseline item's query source same as chart's query so their queries same. i specify master-detail relationship with chart query and baseline item query matching the Group field, everythings seems ok.

But when i made a section used to Group(category) field, chart values changes correctly but baseline values don't change.

is that a bug?
Best regards.
"O"