[Problem/Bug]: Local PDF display black/white page 50% of the time in WebView2.

What happened?

I have the same code for the past 5 years and it has always worked, but in the past month it stopped working reliably. I have the latest stable version of the sdk : 1.0.4191.47

The pdf bar at the top does not even display. And I get no errors and no events.

So I load a local pdf and navigate to it after the webview2 initialization.
We get a black or white (depending on your windows dark mode?) and nothing happens.
I would say that it works and does not works half of the time. Flip a coin.

Waiting for 5 seconds before navigating to the url does not work either.
But if I navigate then 5 seconds later navigate again it does work all the time.
Reloading the page does not work.

My solution was to navigate normally, but inside the event navigationCompleted, I navigate again a second time to that same URL.

That works, but since Windows version of our app is 200x slower than our Apple and Android version because Windows and MS SDKs are slower and unstable (need to delay a lot of stuff just so ms stuff don't c-rash the app), it won't be appreciated by our customers that have not yet transitioned to better modern OS.

Importance

Important. My app's user experience is significantly compromised.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

1.0.4191.47

SDK Version

1.0.4191.47

Framework

WinUI3/WinAppSDK

Operating System

Windows 11

OS Version

All of them

Repro steps

See above

Repros in Edge Browser

Yes, issue can be reproduced in the corresponding Edge version

Regression

Don't know

Last working version (if regression)

No response

Start by reproducing the local PDF navigation in the WinUI3/WinAppSDK WebView2 setup on Windows 11, using runtime and SDK version 1.0.4191.47. Compare the first navigation with the second navigation from navigationCompleted and verify behavior in the corresponding Edge version. Done means local PDFs render reliably without requiring duplicate navigation or an arbitrary delay.