Turbopack Build Failures: OOM, Linked Packages, CSS HMR
The Turbopack failures we have hit on Next.js 16: out-of-memory builds, symlinked packages not resolving, CSS Modules not hot-reloading, loader config.
Writing
Debugging: what we have had to fix
11 write-ups from production, newest first. Each one is a problem hit on a real project and how it was diagnosed and fixed.
Next.js on Vercel: instrumentation, after() and Lost Work
Why background work in a serverless function silently disappears, how after() keeps it alive, what instrumentation.ts is for, and making side effects reliable.
WooCommerce Subscriptions Renewals Failing Silently
Renewals stopped, customers were not charged, nobody was told. How a renewal runs, the five places it breaks, and how to find the cause and recover payments.
WooCommerce Analytics Showing Zero: The Lookup Table Sync
Orders exist, revenue reports say zero. How WooCommerce Analytics builds its numbers from lookup tables, why the sync stops, and how to re-import safely.
Hydration Mismatches With Streaming Suspense: A Diagnosis
What a hydration mismatch means under streaming, six causes on a business site from dates to browser extensions, how to find the element, and the fix for each.
WP-Cron Not Running: Why It Fails and the Server Cron Fix
Scheduled posts stuck, backups skipped, emails delayed: WP-Cron failing on managed hosting. Why it stops, how to diagnose it, and the server cron that fixes it.
WooCommerce Stock Not Reducing on Orders: Hooks and Gateways
Orders come in and stock does not move, or moves twice. When WooCommerce reduces stock, what interrupts it, the held-stock timer, and how to fix and reconcile.
WooCommerce Shipping Rates Not Showing: Zones and Cache
No shipping options at checkout when rates are configured. Zone matching order, class conditions, the shipping cache that hides fixes, and live-rate failures.
Payment Gateway Missing From the Checkout Block: A Diagnosis
A gateway is enabled and absent from the checkout. The decision tree: block support, availability rules, currency and country, SSL, JavaScript errors, caching.
Duplicate WooCommerce Orders: Causes and a Permanent Fix
Customers charged twice or two orders for one purchase. How the checkout creates orders, the retries and webhook overlaps that duplicate them, and the fix.
Action Scheduler Stuck: The Queue Behind WooCommerce Emails
Emails delayed, renewals stalled, thousands of actions pending. How Action Scheduler works, why it stalls, how to read its screen, and how to make it reliable.