Payment Term in sales order not taken from bpartner

[metas-dh]

Is this a bug or feature request?

Bug

What is the current behavior?

On customer db, the payment term in sales order is not taken from bpartner, but the default value 30 days net is set. If there is no default value, the payment term in sales order remains empty.
Note: this is only happening on the customer db, working fine on cloudit & releasetest.

Which are the steps to reproduce?

Check and see.

What is the expected or desired behavior?

Payment Term as set in bpartner, tab customer, shall be set in sales order.