MV3 extension cannot apply rules to about:blank iframes

[AdamWr]

Please answer the following questions for yourself before submitting an issue

• Filters were updated before reproducing an issue
• I checked the knowledge base and found no answer
• I checked to make sure that this issue has not already been filed

AdGuard Extension version

5.0.113

Browser version

Chrome 129

OS version

Windows 11

Ad Blocking

AdGuard Base filter

Privacy

No response

Social

No response

Annoyances

No response

Security

No response

Other

No response

Language-specific

No response

What Tracking protection options do you have enabled?

No response

Issue Details

Steps to reproduce:

1. Add this rule:

example.org#%#alert(document.URL);

2. Go to - https://example.org/
3. Open browser console and run:

(()=>{const frame=document.createElement('iframe');document.body.appendChild(frame)})();

Expected Behavior

There should be 2 alerts displayed.
First when example.org website is opened, then second after executing script to create iframe.

Actual Behavior

Content script is not injected into about:blank iframe, so only one alert is displayed.

Screenshots

Video

2024-09-30.09-44-35.mp4

Additional Information

It's related to this issue - AdguardTeam/AdguardFilters#189789
As far as I understand, in this case rules are not injected into about:blank iframe, so video ads are not blocked by a rule which works in 4.4.22 version.