sys_context in the view and using in oracle forms

CREATE OR REPLACE VIEW QC_DAILY_VW
(DEPT_ID, QC_TYPE_ID, QC_SUBTYPE_ID, QC_DATES, CONTROL_NO)
AS
select a.dept_id,a.qc_type_id,
      a.qc_subtype_id,b.qc_dates,b.control_no
from qc_dept_subtypes a,qc_daily b
where a.dept_id = b.dept_id(+)
and a.qc_subtype_id = b.qc_subtype_id(+)
and a.qc_type_id = b.qc_type_id(+)
--and a.dept_id = 11
and b.qc_dates(+) = to_date(sys_context('mydate','given_date'),'dd/mm/rrrr')
-------------------
In my forms I call this in the post query
my_pkg.test_context(:qc_dept_subtypes.qc_dates);
First time the form is blank. when I close it and reopen then the data displays. Why is this happening.