Unexpected results when filters are applied to grouped products

[stephanie-ehrling]

We are using grouped products and I have a question regarding filters on grouped products. When applying more than one filter, it seems like the filters use "or" logic not "and". That comes from the fact, that the parent grouped products include all information of the child products (merged).

Let's say a grouped product contains a
productA with attribute1 = AB and attribute2 = XY and a
productB with attribute1 = AC and attribute 2 = YZ

When filtering the products a filter with attribute1 = AB and attribute2 = YZ gives is a valid result for that grouped product. But is that the expected result and if not, how could one overcome this behaviour?

Thanks a lot for your ideas.