WebView2 on UWP doesn't support multi-instance app

[ayamadori]

Describe the bug

UWP supports multi-instance app.
https://docs.microsoft.com/en-us/windows/uwp/launch-resume/multi-instance-uwp
WebView2 can be shown on each app instances(windows), but disappear all when close the "first" instance.

Steps to reproduce the bug

1. Create a UWP project
2. Install WinUI 2.8 prerelease which provides WebView2
3. Add a WebView2 to MainPage
4. Change package.appxmanifest to suport multi-instance
5. Launch app (first instance)
6. Launch app again (second instance)
7. Close app window that launched at 5.

Expected behavior

WebView2 on the second instance window is unchanged.

Screenshots

recordedVideo2021-11-07-150624.mp4

NuGet package version

2.8.0-prerelease.210927001

Windows app type

• UWP
• Win32

Device form factor

Desktop

Windows version

No response

Additional context

When close the "second" instance at first, "first" instance is unchanged as expected.

[StephenLPeters]

@codendone and @krschau FYI

[aquinn39]

Are there any updates on this? I have this issue as well.

[github-actions]

This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[aquinn39]

For me this issue still exists, and is a big problem.

[aquinn39]

@llongley What is the reason why this this is not planned on being fixed? This is very basic functionality as many apps support multiple instances, including Microsoft's own. Are these apps going to have to be stuck using the old WebView?

[DmitriyKomin]

@aquinn39 - apologies for the cold close, we are still refining our bookkeeping process/tools :-(. The context here is we are unfortunately unable to investigate most UWP/WinUI2-only given the focus WinUI3 (more on the policy here).

[aquinn39]

@DmitriyKomin Ahh, I see, that's a shame. Thanks for letting me know why it was closed anyway.