Fix unique memory address when doing group-offloading with disk (#11767)
* fix memory address problem
* add more tests
* updates
* updates
* update
* _group_id = group_id
* update
* Apply suggestions from code review
Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com>
* update
* update
* update
* fix
---------
Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com>