Requests made using fetch() not being traced

[cer]

It would be great to get some advice. Thanks.

Problem:

• Requests made by NextAuth to the OAuth2 Authorization Server are traced correctly
• Requests made from application code using fetch():
  • Mac OS: works correctly
  • Container image running node:22-slim: not traced

This is instrumentation.ts:

import { registerOTel } from '@vercel/otel'

export function register() {
  registerOTel({ serviceName: 'next-app',
    instrumentationConfig: {
      fetch: {
        propagateContextUrls: [
          /.*/,
        ]
      }
    }
  })

}

Platforms: container image node:22-slim

$ node -v
v22.14.0

package.json::

  "dependencies": {
    "next": "15.2.2",
    "next-auth": "^4.24.5",
    "@vercel/otel": "^1.13.0",
    "@opentelemetry/api": "^1.9.0",
    "@opentelemetry/api-logs": "^0.57.2",

[kakadiadarpan]

@cer Can you please provide a minimal reproduction of the issue with the whole setup?