Master/details with render false on details when no rows doesn't work fine

Question

I created a standard master/details (form/form) based on Dept and Emp tables.
This work as expected.
Then i changed the rendered property of the details table by setting the following EL #{bindings.DeptView1EmpView2.estimatedRowCount>0}
because i do not want details table to appear when there are no rows
Here is how things go
1) navigate to deptno 10, you see the employees of dept 10 correctly, the same applies to 20, and 30, but when you select dept 40, things start acting kind of wierd
the details table does not disappear as expected
returning back to dept 10, or 20 etc does not also render the details it freezes, keep navigating between 10,20,30 and randomly, the screen refershes correctly, until you again hit an master with empty details.
If you select a master with empty details and use the submit buttom, the details table disappears as it should, if you try other master rows, the details remain hidden until you submit the page manually
any ideas
regards
Ammar Sajdi

Answer 1

hello again
i removed PPT and the autosubmit that are created by default, and replaced them with JavaScript Submit() operation linked to the master table row selector. Now it works, but really i still do not know the negative implications of this work around. I feel it is not a good idea, since ADF designer favoured using the PPR method
Ammar