Guides · 6 min read
Broken Shopify Checkout: Detection & Fix Playbook
How cart and checkout failures happen after theme updates, and how external monitoring catches them before support tickets arrive.
Common causes
- App script conflicts after theme publish
- Custom cart drawer breaking add-to-cart
- Payment wallet misconfiguration on mobile
- Markets/currency switcher edge cases
Detection approach
Uptime monitors ping your homepage — they don't add items to cart. External health checks simulate shopper actions on your live storefront.