Worknotes and comments are not being updated in case activity via import sets

[lucky6]

Worknotes and comments are not being updated in case activity via import sets..but I can see the data in list view.

Is there any additional configuration required for this to populate on case activity form?

Thanks in advance!!!

[lucky6]

I am using OOB case table and audit is already enabled for this.

Even after changing the target table as case comments and work notes are not showing in list as well as activity.