Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/node

SDK Version

8.30.0

Framework Version

nodejs 20.17.0

Link to Sentry event

No response

Reproduction Example/SDK Setup

I made a repo here to demo the issue: https://github.com/Xhale1/sentry-repro

Steps to Reproduce

1. Clone the repo above
2. Add your own sentry dsn
3. Run the dev script
4. Observe that the error only occurs when both integrations: [nodeProfilingIntegration()] and tracesSampleRate: 1 are set. Removing one or the other seems to make the error go away.

Expected Result

Fastify is instrumented properly.

Actual Result

Sentry prints the following to the console:

[Sentry] fastify is not instrumented. This is likely because you required/imported fastify before calling `Sentry.init()`.