Intermittent error loading Markdown when using aws_lambda Nitro preset

[tkgregory]

Environment

AWS Lambda Node.js 22 (not reproducable locally)

Reproduction

https://github.com/tkgregory/nuxt-content-issue

Deployed environment: https://nuxtissue.tomgregory.com/privacy — repeatedly click the links until you see the error (happens about 50% of the time).

Describe the bug

Steps to reproduce

1. Create multiple pages in /pages that include Markdown and link to each other e.g.

/pages/privacy.vue

<template>
   <main>
       <h1 class="text-3xl font-bold mb-8">Privacy</h1>

       <div>
           <NuxtLink to="/support">Support</NuxtLink> &nbsp;
           <NuxtLink to="/privacy">Privacy</NuxtLink>
       </div>

       <ContentDoc path="/privacy" :head="false" />

   </main>
</template>

/pages/support.vue (similar as above)

2. Configure nuxt.config.js:

  nitro: { preset: "aws_lambda" },

3. Deploy to AWS Lambda, serving static content externally via NUXT_APP_CDN_URL
4. View in deployed environment and repeatedly click links between pages.
5. Intermittently observe error rendered in HTML page:

{
  "message": "You should use slots with <ContentDoc>",
  "slot": "default",
  "data": [
    {
      "_path": "/privacy",
      "_dir": "",
      "_draft": false,
      "_partial": false,
      "_locale": "",
      "title": "Privacy",
      "description": "Privacy content goes here",
      "body": {
        "type": "root",
        "children": [
          {
            "type": "element",
            "tag": "p",
            "props": {},
            "children": [
              {
                "type": "text",
                "value": "Privacy content goes here"
              }
            ]
          }
        ],
        "toc": {
          "title": "",
          "searchDepth": 2,
          "depth": 2,
          "links": []
        }
      },
      "_type": "markdown",
      "_id": "content:privacy.md",
      "_source": "content",
      "_file": "privacy.md",
      "_stem": "privacy",
      "_extension": "md"
    },
    {
      "_path": "/support",
      "_dir": "",
      "_draft": false,
      "_partial": false,
      "_locale": "",
      "title": "Support",
      "description": "Support content goes here",
      "body": {
        "type": "root",
        "children": [
          {
            "type": "element",
            "tag": "p",
            "props": {},
            "children": [
              {
                "type": "text",
                "value": "Support content goes here"
              }
            ]
          }
        ],
        "toc": {
          "title": "",
          "searchDepth": 2,
          "depth": 2,
          "links": []
        }
      },
      "_type": "markdown",
      "_id": "content:support.md",
      "_source": "content",
      "_file": "support.md",
      "_stem": "support",
      "_extension": "md"
    }
  ]
}

What I've noticed

When the error occurs, the network tab shows a different response to the XHR API call e.g. https://nuxtissue.tomgregory.com/api/_content/query/bRcR49RreS.1734656338633.json?_params=%7B%22first%22:true,%22where%22:%5B%7B%22_path%22:%22%2Fsupport%22%7D%5D,%22sort%22:%5B%7B%22_stem%22:1,%22$numeric%22:true%7D%5D%7D

The response contains an array of items:

[
	{"_path":"/privacy"},
	{"_path":"/support"}
]

(truncated for clarity)

When the error doesn't occur, the response includes a single item:

{"_path":"/support"}

(truncated for clarity)

Could be that the response contains an array of items, rather than the specific item, that's causing the issue?

What else?

• No error responses for any network calls
• No errors logged in browser console
• No errors logged on backend
• Works running locally via npm run dev
• Works running locally via Node.js (without aws_lambda Nitro preset)
• Works when NUXT_APP_CDN_URL is not set

Additional context

View the deployment configuration in severless.yml (uses Serverless Framework).

Logs