When I embed the Google Tag Manager snippet into my MERN-stack site, every page still loads perfectly—except the product-detail route. That single view turns blank as soon as GTM is active, yet it works normally the moment I comment the container out. I need an industry expert who can quickly diagnose what in the React/Express stack is colliding with Tag Manager, then patch it so the page renders flawlessly with GTM enabled. Here’s the flow I expect: • Replicate the break in a staging branch I’ll provide. • Trace the offending script, component lifecycle quirk, or build setting through Chrome DevTools, React DevTools, or any profiler you prefer. • Deliver a clean fix (code + brief change log) that keeps analytics firing while restoring full product details, with no side effects on About, Contact, or any other page. • Walk me through the root cause in plain language so I can avoid similar conflicts down the road. Tech context: React front end (create-react-app), Node/Express API, MongoDB, Webpack. No framework change is required—just a precise, well-documented adjustment. If this sounds straightforward for you, let’s get it solved today.