Websockets dont work with a router

Problem

I'm not sure if this is a bug or not but websockets wont work with a proxy table e.g [code block] It works fine proxying web requests. But websockets don't work. If I access the site directly it does work (with websockets) I also unsuccessfully tried adding in [code block] It also looks like `server.on('upgrade` doesn't fire. In addition, even without the above event. If there are attempts to use websockets (after a while). The below error will appear: [code block] After a while it will run out of memory and crash.