https://userapps.support.sap.com/sap/support/knowledge/en/3586528
3586528 - MIRO: KDM vs. BSX lines at accounting level - SAP ERP & SAP S/4HANA | SAP Knowledge Base...
After an invoice is simulated or posted, the exchange-rate differences are posted to an unexpected G/L account. This KBA explains how the differences may be...