Cannot use "contains" operation for an object of runtime type List gotten from Map.

Issue

On RHDM 7.12.0 or later releases, when we build a project containing a rule like (*1) and a data object like (*2), the error (*3) occurs against the constraint (*1-1).

(*1) Example rule

dialect "mvel"

rule "Rule 1"
    when
        DataStore( data["FinalistsTeamList"] contains "Argentina" )    // (*1-1) data["FinalistsTeamList"] contains "Argentina"
    then
        System.out.println("***** Action of Rule 1");
end

(*2) Example Data Object

public class DataStore {
    private Map<String, Object> data;

    public Map<String, Object> getData() {
        return data;
    }

    public void setData(Map<String, Object> data) {
        this.data = data;
    }
}

(*3) Error in question

Cannot use contains on class java.lang.Object in expression 'data["FinalistsTeamList"] contains "Argentina"' : [Rule name='Rule 1']