Index: src/stock-adjustment-mobile/add-products-page/add-product-page.jsx
===================================================================
diff -u -N -r0f27e4111baccf6dba30207bd168429576fa830f -re549317e3cd8668f87c35832569bd63c2072a59a
--- src/stock-adjustment-mobile/add-products-page/add-product-page.jsx	(.../add-product-page.jsx)	(revision 0f27e4111baccf6dba30207bd168429576fa830f)
+++ src/stock-adjustment-mobile/add-products-page/add-product-page.jsx	(.../add-product-page.jsx)	(revision e549317e3cd8668f87c35832569bd63c2072a59a)
@@ -45,7 +45,9 @@
             stockOnHand: (productVal, itemsVal) => {
                 const orderable = itemsVal.items[0]?.product ?? [];
                 if (itemsVal.items[0].hasOwnProperty('lot')) {
-                    delete itemsVal.items[0].lot;
+                    let copiedItemData = Object.assign({}, itemsVal.items[0]);
+                    delete copiedItemData.lot;
+                    itemsVal = update(itemsVal.items, { [0] : {$set: copiedItemData} });
                 } 
                 const lotCode = null; 
                 return getStockOnHand(orderable, lotCode);