Grid - Filtering Child-Entity by Lookup field

I was trying to …

Filter Child entity by field where is the lookup.

  1. I click + button and select a category in the grid panel listing child entities.

I was expecting …

See list of filtered items by the selected category.

Instead I’ve got …

Empty grid with no items found.

obrazek

Can you post a screenshot where the data are unfiltered? Was there actually an item with Kraj = "Liberecký kraj" in the list?