I'm trying to build cascade combox box connecting to a SharePoint list. The list has columns Region and Country. In the Powerapps form I've added 2 combo boxes one for Region and another for Country both allow multi selection. When multiple regions are selected, I want to display all the countries for the selected regions. This is how my Items filter look
Region combo box - Distinct('MyList', Region)
Country combo box - Filter('MyList' ,Region in RegionComboBox.SelectedItems.Result).Country
In the design mode, I can see the Country combo shows the delegation warning. When I run the app and select one or more regions, Country combo does not display anything. I hardly have about 40 items in the list. How do I avoid the delegation warning?