Websockets on App Platform, initial connection is slow, seconds not milliseconds

We’ve been using websockets on App Platform for a long time already, so a service that runs a websocket server, accessed through a path on the App domain.

However, recently I noticed that the initial connection of the websocket can be very slow, 10 or 15 seconds even. When logging, I can see that the request doesn’t reach the service. So in other words it’s not the service that is slow, it’s the App Platform load balancer.

I am now running the websocket server on a separate droplet, and connection time is never slow. But I rather run it inside App Platform for easier maintenance.

Is there something I can do to remedy or further troubleshoot this?