Swagger trying to use hardcoded port instead .env PORT value

[DreamShaded]

Environment

NodeJS: 20.11.0
NitroPack: latest (2.9.1)

Clean Nitro, without Nuxt

Reproduction

1. Create dotenv file at root dir with PORT and/or NITRO_PORT not equal 3000, for example, 3001
2. Set experimental.openApi as true at defineNitroConfig function
3. Write some api, for me it was greeting function returning { hello: 'world' }
4. Start dev server
5. Check Nitro features working on custom port
6. Go to /_nitro/swagger
7. Try to execute some requests

Describe the bug

I want to see results for executed request using my custom port.
I get the "failed to fetch" error, caused wrong request port.

Additional context

You can look at this on StackBlitz, wait for init and go to sb_url/_nitro/swagger

Logs

No response