@umair , there is only 1 Sales Invoice & 1 Delivery Note linked to that Sales Order for case above. However i have tested with Sales Order that has more than 1 Sales Invoice & Delivery Note, the behavior is the same.
This SO has 5 SINV, with clicking ‘sales invoice’ (see arrow) , showing results of 10 rows, instead of 5 which is confusing. Even if the SO has only 1 SINV, it should only show 1 sales invoice instead of the sales invoice items.
Thank you.