[Bug]: appdir Next 13 SPA works, but when visit directly, it downloads a file instead

[antonybudianto]

Summary

Nextjs 13 with appdir, deployed with Netlify have issue where if the page is visited directly, it downloads a file instead...
This doesn't happen with local build+start

Sample: https://antonybudianto.com/blog/hello

Steps to reproduce

1. Clone https://github.com/antonybudianto/next-antonybudianto/
2. Deploy with Netlify
3. Try visit page /blog/hello directly (not via links)
4. It will download a file on browser instead of opening the page

A link to a reproduction repository

https://github.com/antonybudianto/next-antonybudianto/

Next Runtime version

4.29.3

More information about your build

• I am building using the CLI
• I am building using file-based configuration (netlify.toml)

What OS are you using?

Mac OS

Your netlify.toml file

`netlify.toml`

[[plugins]]
package = "@netlify/plugin-nextjs"

Your public/_redirects file

`_redirects`

# Paste content of your `_redirects` file here

Your next.config.js file

`next.config.js`

/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: false,
  swcMinify: true,
  experimental: {
    appDir: true,
  },
};

module.exports = nextConfig;

Builds logs (or link to your logs)

Build logs

# Paste logs here

Function logs

Function logs

# Paste logs here

.next JSON files

generated .next JSON files

# Paste file contents here. Please check there isn't any private info in them
# You can either build locally, or download the deploy from Netlify by clicking the arrow next to the deploy time.

[ascorbic]

Hi. Next appDir isn't supported in the default version of the runtime yet. Can you try again after installing @netlify/plugin-nextjs@latest in your project?

[antonybudianto]

Let me try with latest tag..

[antonybudianto]

Ah it's good now with latest plugin version, however, the SPA navigation breaks now 😅

[ascorbic]

Do you have a live example?

[ascorbic]

OK, I think I've diagnosed this, so I'm closing this in favour of #1844 which is the same issue.