When using the new "field parameters" feature to switch the rows of a matrix between e.g. fields from DimProduct and fields from DimStores, drill downs are not preserved.
E.g. when drilling down on DimProduct[Product Category] = "TV and Video", the matrix correctly shows the breakdown on the next level: DimProduct[Product Subcategory]. Also all other visuals on the page get the filter DimProduct[Product Category]) = "TV and Video" applied. So far so good.
But when then using the field parameter to switch the rows of the matrix to e.g. "DimStores[Continent]", the matrix loses the filter on Product Category: instead of showing the figures just for "TV and Video", it shows the figures for all products. The other visuals on the page however still have the filter for "TV and Video" (!), but this is also lost when another drill down is done in the matrix, e.g. on DimStores[Continent].
@jeroenterheerdt : if this could be fixed, the "field parameters" feature is a great addition to Power BI!
Currently you can't use field parameters as the linked fields of a drill-through or tooltip page. You can put your idea to Ideas Forum , if a feedback is high voted there by other customers, it will be promising that Microsoft Product Team will take it into consideration when designing the next version in the future.