URL parameter isn't removed if subdomain is added to exceptions

### Please answer the following questions for yourself before submitting an issue

- [x] Filters were updated before reproducing an issue
- [x] I checked the [knowledge base](https://adguard.com/kb/) and found no answer
- [x] I checked to make sure that this issue has not already been filed

### AdGuard version

2.16.4.1870

### Browser version

Chrome 136

### OS version

macOS 15.4.1

### Ad Blocking

AdGuard Base filter, AdGuard Mobile Ads filter

### Privacy

AdGuard Tracking Protection filter, AdGuard URL Tracking filter

### Social

AdGuard Social Media filter

### Annoyances

AdGuard Cookie Notices filter, AdGuard Popups filter, AdGuard Mobile App Banners filter, AdGuard Other Annoyances filter, AdGuard Widgets filter

### Security

_No response_

### Other

_No response_

### Language-specific

AdGuard Russian filter

### Which DNS server do you use?

Custom DNS

### DNS protocol

DNS-over-HTTPS

### Custom DNS

Personal AdGuard DNS

### What Stealth Mode options do you have enabled?

Block trackers, Hide your search queries, Remove tracking parameters, Self-destruction of third-party cookies, Disable cache for third-party requests, Hide your Referrer from third-parties, Remove X-client-Data header from HTTP request, Protect from DPI

### Support ticket ID

_No response_

### Issue Details

Steps to reproduce:
1. Go to https://speed.cloudflare.com/ and add the site to exclusion via browser assistant (or add to User filter this rule: `@@||speed.cloudflare.com^$important,document`)
2. Click on "Built with Cloudflare Developer Platform" link in the top right corner

### Expected Behavior

AdGuard removes `utm_source` tracking parameter from URL.

### Actual Behavior

`utm_source` tracking parameter is present in the URL, although Browser Assistant says that page is filtering.

### Screenshots

Screenshots



### Additional Information

_No response_