fix: POS Sync Issue (#18807)

diff --git a/erpnext/accounts/doctype/sales_invoice/pos.py b/erpnext/accounts/doctype/sales_invoice/pos.py
index 479548c..e290b23 100755
--- a/erpnext/accounts/doctype/sales_invoice/pos.py
+++ b/erpnext/accounts/doctype/sales_invoice/pos.py
@@ -432,7 +432,6 @@
 
 	return cust_id
 
-
 def make_customer_and_address(customers):
 	customers_list = []
 	for customer, data in iteritems(customers):
@@ -449,7 +448,6 @@
 	frappe.db.commit()
 	return customers_list
 
-
 def add_customer(data):
 	customer = data.get('full_name') or data.get('customer')
 	if frappe.db.exists("Customer", customer.strip()):
@@ -466,21 +464,18 @@
 	frappe.db.commit()
 	return customer_doc.name
 
-
 def get_territory(data):
 	if data.get('territory'):
 		return data.get('territory')
 
 	return frappe.db.get_single_value('Selling Settings','territory') or _('All Territories')
 
-
 def get_customer_group(data):
 	if data.get('customer_group'):
 		return data.get('customer_group')
 
 	return frappe.db.get_single_value('Selling Settings', 'customer_group') or frappe.db.get_value('Customer Group', {'is_group': 0}, 'name')
 
-
 def make_contact(args, customer):
 	if args.get('email_id') or args.get('phone'):
 		name = frappe.db.get_value('Dynamic Link',
@@ -506,7 +501,6 @@
 		doc.flags.ignore_mandatory = True
 		doc.save(ignore_permissions=True)
 
-
 def make_address(args, customer):
 	if not args.get('address_line1'):
 		return
@@ -521,7 +515,10 @@
 		address = frappe.get_doc('Address', name)
 	else:
 		address = frappe.new_doc('Address')
-		address.country = frappe.get_cached_value('Company',  args.get('company'),  'country')
+		if args.get('company'):
+			address.country = frappe.get_cached_value('Company',
+				args.get('company'),  'country')
+
 		address.append('links', {
 			'link_doctype': 'Customer',
 			'link_name': customer
@@ -533,7 +530,6 @@
 	address.flags.ignore_mandatory = True
 	address.save(ignore_permissions=True)
 
-
 def make_email_queue(email_queue):
 	name_list = []
 	for key, data in iteritems(email_queue):
@@ -550,7 +546,6 @@
 
 	return name_list
 
-
 def validate_item(doc):
 	for item in doc.get('items'):
 		if not frappe.db.exists('Item', item.get('item_code')):
@@ -569,7 +564,6 @@
 			item_doc.save(ignore_permissions=True)
 			frappe.db.commit()
 
-
 def submit_invoice(si_doc, name, doc, name_list):
 	try:
 		si_doc.insert()
@@ -585,7 +579,6 @@
 
 	return name_list
 
-
 def save_invoice(doc, name, name_list):
 	try:
 		if not frappe.db.exists('Sales Invoice', {'offline_pos_name': name}):
diff --git a/erpnext/accounts/page/pos/pos.js b/erpnext/accounts/page/pos/pos.js
index 3834c96..b5a02d0 100755
--- a/erpnext/accounts/page/pos/pos.js
+++ b/erpnext/accounts/page/pos/pos.js
@@ -1762,18 +1762,11 @@
 		this.si_docs = this.get_submitted_invoice() || [];
 		this.email_queue_list = this.get_email_queue() || {};
 		this.customers_list = this.get_customers_details() || {};
-		if(this.customer_doc) {
-			this.freeze = this.customer_doc.display
-		}
 
-		freeze_screen = this.freeze_screen || false;
-
-		if ((this.si_docs.length || this.email_queue_list || this.customers_list) && !this.freeze) {
-			this.freeze = true;
-
+		if (this.si_docs.length || this.email_queue_list || this.customers_list) {
 			frappe.call({
 				method: "erpnext.accounts.doctype.sales_invoice.pos.make_invoice",
-				freeze: freeze_screen,
+				freeze: true,
 				args: {
 					doc_list: me.si_docs,
 					email_queue_list: me.email_queue_list,