3331986 - Proposed quantity in MIGO for stock transfer scheduling agreement

You have a stock transfer scheduling agreement with a few schedule lines having dates in the past and in the future. 
When you simulate the posting of a 'Goods Issue' and a 'Goods Receipt' in the 'Post Goods Movement' (MIGO) APP,
the proposed Qty is different in each case. 

SAP S/4Hana Cloud - All Versions 

1) Create a stock transfer scheduling agreement
2) Add some schedule lines with past and future dates 
3) Go to the 'post goods movement' APP 
4) enter a goods receipt (101) 
5) enter a goods issue (351)  
6) The results are not the same 

Standard system behaviour 

The 2 posting types have a different proposed Qty calculation:

When you post a 'Goods Issue' for a scheduling agreement, the system proposes 
the open purchase order Qty (The total Qty of all schedule lines) and considers any
goods movements that might exist in the purchase order history in the proposed Qty. 

When you post a 'Goods Receipt' for a scheduling agreement, the system 
considers all open schedule lines with a date less than or equal to todays date. 

EKEK-ABRDT, EKEK, EKEH, ME_READ_LAST_RELEASE, LEINRF2K, XEBEFU_AUFBAUEN, ME_EKPO_READ_WITH_EBELN, ME_READ_ITEM_GOODS_RECEIPT, GOITEM-ERFMG , KBA , MM-IM-GR-MIGO-2CL , Goods Receipt from External Procurement (MIGO) (Public Cld) , Problem