Facing checkout issue when we have large number of products

Topic summary

A checkout error is occurring when carts contain a large number of products (80+ items). The issue began last week and manifests when users click “continue to shipping” during checkout.

Error symptoms:

  • “Something went wrong” message appears
  • “There was a problem loading this page” error
  • Checkout creation succeeds initially, but fails at the shipping step

Supporting evidence:

  • Screenshots have been attached showing the error messages

Current status:

  • The issue remains unresolved
  • The user is requesting assistance to fix this problem

This appears to be a performance or system limitation issue related to processing large cart sizes in the custom storefront implementation.

Summarized with AI on November 23. AI used: claude-sonnet-4-5-20250929.

Since last week we’re facing a checkout issue when we have a large number of products. we’ve added more than 80 products to the cart. checkout is created successfully. when I click continue to shipping it throws Something went wrong or There was a problem with loading this page. I’ve attached the screenshot here. Kindly help us to resolve this issue