R42520A Split lines with wrong AEXP

Hi Experts,

I have a strange problem, maybe related to a wrong setup. I have a normal SO of 1 line with 10000 KG for Item PF003 with an UPRC=42.7 and an AEXP=427000.

I have enough lots of PF003 available in stock, to cover all the order quantity of SO.

I try to launch R42520 to commit the lots and split SO lines with hard-commit PO activated:

The result is that AEXP is completely incorrect. It seems to be AEXP=UPRC* (sum (UORG of all rows) - sum (UORG of all rows<actual row)):

I think it is a setup problem, but I cannot find the solution.