Why Our Next.js 15 App Lost 80% of Its Traffic Overnight (And How We Fixed It) 📉
📉 My Traffic Dropped to 0 overnight: The Next.js 15 Hydration Trap Imagine waking up, checking your Google Analytics 4 (GA4) dashboard for your shiny new SaaS product, and seeing a horrifying number: 0 Users. 0 Views. 100% Drop. Did the servers crash? Did Google de-index my domain? Neither. The site was running perfectly fine. The culprit? A sneaky Hydration Mismatch in Next.js 15 that silently murdered my tracking script. Here is how a seemingly innocent <GoogleAnalytics /> component placement caused a complete tracking blackout on sandagent.dev, and how you can avoid this exact trap. 🕵️ The Crime Scene Like any good Next.js developer, I wanted to add Google Analytics to my app/layout.tsx . Standard procedure, right? I used a third-party GA package (or standard next/third-parties/google ) and placed it right where it belongs—in the <head> tag. // ❌ The Deadly Mistake export default function RootLayout ({ children }: { children : React . ReactNode }) { return ( < html lang = "en" > < h
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