Issue with Export data store entity to excel smart service

Hi Experts, 

I have an issue with export data store entity to excel that 

without changing any piece of code:

Sometimes it is giving exact result in excel as expected

Sometimes it is giving few duplicate rows at the bottom of the excel

If I download few excel files from the same Page, few excel files seems perfect, few have duplicate rows at bottom

I'm failing to fix it.

Please help me with some suggestions and if is there any work around.

Thank you in advance