Http2 fails on Koa with nuxt.render

[gotenxds]

Version

v2.8.1

Reproduction link

https://cmty.app

Steps to reproduce

Start a project with koa as server

change to http2

implement some route

try to access this route from client

you'l get a (node:7884) UnsupportedWarning: Status message is not supported by HTTP/2 (RFC7540 8.1.2.4) with a 500.

What is expected ?

To not throw a 500

What is actually happening?

nuxt.render is likely adding some message to the response, this is not allowed as of http2

Additional comments?

Hello, I tried posting this on Koa template but was unable to as there is no version options for it in cmty.

_{This bug report is available on Nuxt community (#c9582)}