Hello Joe,
This is expected behavior, not a bug. In Data Grid 2, the Drop-down filter only supports Boolean and Enumeration attributes, so you can’t target a String attribute directly.
Workaround (many-to-one): The correct approach for many-to-one is to filter by the association: select the column’s attribute (e.g., Name), select the reference (association), and use a datasource to supply the selectable objects (e.g., a DS microflow returning all Companies). Then set the caption to the text field (Name) .
Hope it helps!