Bug when using a field parameter in a matrix visual

[Quiny_Harl]

When a dimension field parameter is used in a matrix visual that has more than one expanadable rows, the visual is collapsed to the level of the field parameter whenever I make a selection from the field parameter slicer. 
Consider the following matrix, where COST_PERIOD is the dynamic field and TEST PARAMETER is the slicer that controls that field:

As you can see, the table is expanded to tge level of Vendor Name. Now, when I make another selection fron the TEST PARAMETER slicer, the table is automatically collapsed to the level of the COST_PERIOD field and I have to expand everything all over again:

[v-yetao1-msft]

Hi @Quiny_Harl 

I tried to restore the scenario you mentioned but failed, can you provide your sample for reference ?

Best Regards,
Community Support Team _ Ailsa Tao

[Quiny_Harl]

@v-yetao1-msft,
please, download a sample file from here: https://filetransfer.io/data-package/OOJOJASB#link

[Quiny_Harl]

@v-yetao1-msft , any updates?

[Quiny_Harl]

@v-yetao1-msft 

any updates, please?