Selective element blocking not possible

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

- [x] I am running the latest version
- [x] I made sure all content blockers are enabled in Safari settings
- [x] I checked the documentation and found no answer
- [x] I checked to make sure that this issue has not already been filed

### AdGuard version

AdGuard Mini 2.1.2.983 (App Store)

### Environment

```markdown
- OS: 26.4 Beta (25E5218f)
- Safari version: Version 26.4 (21624.1.13.11.3)
```

### What filters do you have enabled?

AdGuard Base filter, AdGuard German filter, AdGuard URL Tracking filter, AdGuard Tracking Protection filter, AdGuard Popups filter, AdGuard Other Annoyances filter, AdGuard Social Media filter, AdGuard Annoyances filter, AdGuard Cookie Notices filter

### Issue Details

Steps to reproduce:
1. Go to any linkedin job description
2. Select Plugin Icon -> Block element
3. See picture

### Expected Behavior

Beeing able to block element on site.

### Actual Behavior

Site completely disappeared

### Screenshots

Screenshot 1:

### Additional Information

_No response_