Sorting Not Working in Web Service backed Record

Hi All,

I am Unable to do Sorting on Columns in Records Data Source is Webservice (Using an Expression rule to fetch The Data).

Sort Column is already added in Grid Section of Record.

Also i have Tried initial and Secondary Sort option availble in Record Section .

Secondary Sort:

{

a!sortInfo(
field: OneDate
ascending: false()
),
a!sortInfo(
field: twoDate
ascending: false()
)
}

Initial Sort:

 a!sortInfo(
field: dateField
ascending: false()
)

Its Working only when record Loads for First time

For next time when we click on column it is not working.

Thanks in Advance!!