[w3c/ServiceWorker] Service worker catches requests from different ports (Issue #1646)

I'm posting this question here because I dont know whether it's a specified behavior nor a bug. So I would really appreciate if there are some confirmations about this.

As you can see from this log then it's look like my service worker is catching requests from a different port. It happens when I navigate to this url `http://localhost:5000/users/sign-in`.
<img width="1343" alt="Screen Shot 2022-06-01 at 16 38 02" src="https://user-images.githubusercontent.com/7781091/171384369-ac2ded4e-a3ca-48e4-961d-f86160426b29.png">
The code for registering service worker
```typescript
await navigator.serviceWorker.register("/app/service-worker.js", {
    scope: "/",
    updateViaCache: "none"
})

// header for /app/service-worker.js
Service-Worker-Allowed: /
```
The request to port `35730` is coming from this
```html
<script async="" src="//localhost:35730/livereload.js?snipver=1" id="livereloadscript"></script>
```
With this configuration, shouldn't service worker catches requests to `http://localhost:5000/` only?

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