We run an app that's built with Node.js in a microservice-based architecture. Now I've migrated the whole stuff to bare-metal Kubespray Kubernetes with Nginx as an ingress controller, but I've got an issue understanding a phenomenon when analyzing the request from my chrome browser in the Inspect Network Tab, the app before did generate a parallel request to the app but the one in k8s is taking one-continued request that is a little longer than the first architecture requests (we use Nginx in the previous architecture for reverse proxy).

Old architecture: https://i.stack.imgur.com/37R3Y.png

K8s architecture: https://i.stack.imgur.com/ksKDx.png

Any Help, please ?