How to access elements within iframes?

[n303ef]

Some websites have iframes.
We can get it's DOM Element by calling QuerySelectorAsync() and then ContentFrameAsync(), or by DevToolsContext.Frames.
In that Frame element, we also can call QuerySelectorAsync to get inner elements. Problem is that at 90% websites all QuerySelectorAsync methods within frames hang and never return result. And it works on other 10% of websites. I think it's because of CORS policy or something similar. Is there a way to correctly access such elements?

[amaitland]

OOPIF's aren't working currently.

https://github.com/cefsharp/CefSharp.Dom/blob/main/lib/PuppeteerSharp.Tests/FrameTests/FrameManagementTests.cs#L151