Invoice Split due to difference in payment terms

Good Evening !

Scenario Steps :

     1. Create two orders with different payment term at header and item level for both orders.

     2. Create a single Delivery for above two orders.

     3. Add a packing material in delivery which is not present in the order.

     4. Create an Invoice after PGI.

Now when I create an Invoice for the delivery, Invoice Split is happening. The Second Invoice is having only the line item of Packaging Material in it.

If I see the split analysis the reason it says is - the Payment Term are different at Header level.

Now if i create a similar scenario but only for a

single order(different payment term at header and line item level) -> delivery(with the packaging material) -> invoice ,

Invoice split is not happening.

Can anyone please explain this behavior any possible solution for the same?

Thanks in Advance,

Theerthesh.