We have problem that reservations will not be done in certain scenarios.
If nothing in stock and no open transactions, there will be no reservation when creating a sales order - that is ok.
But when creating a purchase order - should not that purchase order trigger to have reservation done on the sales order?
Nothing happens.
And if you create a new sales order with the same item, this new sales order will reserve what to be expected by the purchase order and this is wrong.