diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index 21a20a7bce..6c2144d6cb 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -737,28 +737,34 @@ erpnext.TransactionController = erpnext.taxes_and_totals.extend({
 				this.frm.trigger("item_code", cdt, cdn);
 			}
 			else {
-				var valid_serial_nos = [];
-				var serialnos = [];
 				// Replacing all occurences of comma with carriage return
 				item.serial_no = item.serial_no.replace(/,/g, '\n');
-				serialnos = item.serial_no.split("\n");
-				for (var i = 0; i < serialnos.length; i++) {
-					if (serialnos[i] != "") {
-						valid_serial_nos.push(serialnos[i]);
-					}
-				}
 				item.conversion_factor = item.conversion_factor || 1;
-
 				refresh_field("serial_no", item.name, item.parentfield);
-				if(!doc.is_return && cint(user_defaults.set_qty_in_transactions_based_on_serial_no_input)) {
-					frappe.model.set_value(item.doctype, item.name,
-						"qty", valid_serial_nos.length / item.conversion_factor);
-					frappe.model.set_value(item.doctype, item.name, "stock_qty", valid_serial_nos.length);
+				if (!doc.is_return && cint(frappe.user_defaults.set_qty_in_transactions_based_on_serial_no_input)) {
+					setTimeout(() => {
+						me.update_qty(cdt, cdn);
+					}, 10000);
 				}
 			}
 		}
 	},
 
+	update_qty: function(cdt, cdn) {
+		var valid_serial_nos = [];
+		var serialnos = [];
+		var item = frappe.get_doc(cdt, cdn);
+		serialnos = item.serial_no.split("\n");
+		for (var i = 0; i < serialnos.length; i++) {
+			if (serialnos[i] != "") {
+				valid_serial_nos.push(serialnos[i]);
+			}
+		}
+		frappe.model.set_value(item.doctype, item.name,
+			"qty", valid_serial_nos.length / item.conversion_factor);
+		frappe.model.set_value(item.doctype, item.name, "stock_qty", valid_serial_nos.length);
+	},
+
 	validate: function() {
 		this.calculate_taxes_and_totals(false);
 	},