fix iou type and chat report ID on going back in amount selection

Author: s77rt

src/pages/iou/request/step/IOURequestStepAmount.tsx

@@ -326,9 +326,9 @@ function IOURequestStepAmount({
 
                 // Preserve user's participant selection to avoid forcing them back to default workspace.
                 const iouReportID = transaction?.reportID;
-                const selectedReport = iouReportID ? getReportOrDraftReport(iouReportID) : null;
+                const selectedReport = iouReportID === CONST.REPORT.UNREPORTED_REPORT_ID ? selfDMReport : getReportOrDraftReport(iouReportID);
                 const navigationIOUType = isSelfDM(selectedReport) ? CONST.IOU.TYPE.TRACK : CONST.IOU.TYPE.SUBMIT;
-                const chatReportID = selectedReport?.chatReportID ?? iouReportID;
+                const chatReportID = selectedReport?.chatReportID ?? selectedReport?.reportID;
 
                 Navigation.setNavigationActionToMicrotaskQueue(() => {
                     Navigation.navigate(ROUTES.MONEY_REQUEST_STEP_CONFIRMATION.getRoute(CONST.IOU.ACTION.CREATE, navigationIOUType, transactionID, chatReportID));