Update prerender-server/src/server.js

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: DeviaVir

prerender-server/src/server.js

@@ -100,10 +100,11 @@ app.use((req, res, next) => {
     const end = renderDuration.startTimer()
     let metricsUpdated = false
     render(req._parsedUrl.pathname, req._parsedUrl.query || '', req.body, { theme, lang, isHead: req.method === 'HEAD' }, (err, resp) => {
+      // Always decrement activeRenders and send IPC message, even if metricsUpdated is true
+      if (typeof process.send === 'function') process.send({ type: 'endRender' })
+      activeRenders.dec()
       if (!metricsUpdated) {
         metricsUpdated = true
-        if (typeof process.send === 'function') process.send({ type: 'endRender' })
-        activeRenders.dec()
         end()
         totalRenders.inc()
       }