Lighthouse in F12 DevTool not working

[kiddliu]

Description
As the title says, Lighthouse in F12 DevTool not working

Version
SDK: 1.0.1988-prerelease
Runtime: 115.0.1091.200
Framework: WPF
OS: Windows 11 Insider Preview, 25921.1000

Regression
Was this working before but has regressed? Yes
If yes, what version did this last work on? With Runtime 114 it's worked

Repro Steps

1. Create a WPF application with the official template.
2. In the MainWindow.xaml, add

    <DockPanel>
        <Wpf:WebView2 Name="WebView" Source="https://www.google.com.hk/"/>
    </DockPanel>

3. Build and run the app
4. Open the DevTool with F12, go to the Lighthouse tab
5. Click Analyze page load, the dialog displays Lighthouse is warming up and no progress <- Problem

Screenshots

Additional context
N/A

AB#45948422

[novac42]

@kiddliu Thanks for reporting the issue. You mentioned with Runtime 114 it worked, was it on the same OS version?

[kiddliu]

@novac42 for my case I cannot say for sure, but later after confirmed with my colleagues, I'm not the only one with this problem. We're all on Windows 11, but with different builds: 22621, 25921.

Another possible useful information is that Lighthouse also not works on Microsoft Edge v115.

[champnic]

Another possible useful information is that Lighthouse also not works on Microsoft Edge v115.

That's probably the underlying issue. I'm going to add this bug to our backlog and check with the DevTools team if this is a known issue they're already looking into. Thanks!