Form gird values do not appear immediately

Hi,

I have a form gird that has a JDBC load binder. The JDBC loadbiner is;

select t.c_Role, u.c_Username, t.c_Project_ID from
app_fd_my_Team t inner join
app_fd_my_Users u on u.id = t.c_User_ID
where t.c_Project_ID ='#form.my_Projects.id#'

The form grid is on a Multi-Form Page with the following settings

When I create the record and click save on the parent form, no data appears in the username field (this field is from the SQL join). It only appears when I click to a different tab or when I reload the whole form. Is this normal and how can I fix this? thanks.