Credit limit check cause the item schedule line confirmed qty empty

Hi,

I have an SO that is under credit limit check, the problem is, after releasing it via VKM3, the confirmed qty at item schedule line is not taking the qty as of stock at the time. The SO qty is 100 Pcs, but there's still stock of 80 Pcs. I will then need to split the schedule line to 2 lines --> 1st line with order qty 80 Pcs, and 2nd line 20 Pcs. Then only the confirmed qty appear for the 80Pcs.

For usual SO that is without credit checking, the confirmed qty will immediately shown as in 1 schedule line. Does anyone know why is this happening and can we amend this problem?

Thanks.