BCS_down payment reverses CB budget

hi all,

We are in profile 350. I have noticed that When i create a downpayment with reference to a PO the CB gets reversed with doc type 200.

This is not correct. Only PB should be consumed during DP and CB should impact only during SES/MIRO.

I saw few discussions where it says its standard behavior if DP is created with reference to PO. and advised to create down payment request without PO reference. But if I do that, then during SES i will get error saying no budget in PB also since CB budget for the particular PO is reversed, system will accept new commitments and I will get short budget in CB budget during SES/MIRO.

Please advise.

thanks