Shopify Checkout pre-fill not working by adding attributes to checkout URL

[shashwat-jha-0608]

Hi team,
Context: We create payments & enhanced checkout products for Shopify stores in India. We help pre-fill Shopify Checkout with buyers' address and phone numbers by adding attributes to the checkout URL. Here's an example of the URL: https://www.snitch.co.in/checkout?checkout[email]=razorpay@gmail.com

Issue: We noticed today that pre-fill is not working for any of our merchants even though the attributes are passed correctly. You can check this at https://www.snitch.co.in/. Can you please help us solve this issue immediately, as it is a core part of the flow and is significantly impacting the order conversion rate for all of our merchants.