Hi Sampath,
Seems like you are looking for some ghost blocks which are present; however, not visible.
In order to understand the skeleton of Report tab, follow the below steps:
1. Click on "Map" button on left hand side panel.
2. Click on "Structure" button and expand the specific Report tab.
3. Check the blocks/components present under Report Body.
4. Search for the ghost tables, Right Click and Remove.
Also look for ghost blocks in Report Header and Footer and remove.
Hope it will help.
Refer the attached screenshot for further clarity.
Regards,
Yuvraj