Bugs: Using Group by along with NZ results in unreadable characters

1. Create new a table called Table1. 
2. Create an Integer field (actually any numeric field seems to work) called intField1 in the table, and save.
3. Open the table and add a few records 
4. Create a new query with this SQL:

   SELECT Nz([intField1]) AS Expr1
   FROM Table1
   GROUP BY Nz([intField1]);

5. And run the query

When I do this, instead of the numbers I entered into the table, the query returns weird character symbols. 

This only occurs if you do a Group By on the field with the Nz calculation.

A workaround for now is to use the CInt function (or equivalent for other numeric data types) on the result of the Nz function, e.g. GROUP BY CInt(Nz([intField1]))