List view is grouped by field "Created year" of type "Number" and then by field "Created month" of type "Text" does not show entries while trying to expand the grouping. Both are calculated columns and return Number and Text respectively.
I have also tried by returning Date from "Created year" and also Date from "Created month" but it still does not let item entries expand
Column: Created year settings:
Column: Created month settings:
List view does NOT expand values:
Where am i wrong?