Creation of WebView2 hangs with 100% CPU msedgewebview2.exe process (probably renderer process)

[Urmeli0815]

Description
A customer is experiencing a problem with WebView2 in our application. Our application starts and waits for WebView2 to be initialized. One msedgewebview2.exe process occupies one CPU core 100% and our app hangs.

Customer already reinstalled WebView2 and also mentioned that no special Anti-Malware application is active (just built-in Windows defender).

Version
SDK: 1.0.1518.46
Runtime: 115.0.1901.200
Framework: Win32
OS: Win10

Screenshots

Additional context
The customer sent us dumps of the CPU-burning process, we could provide them for analysis.

[aluhrs13]

@Urmeli0815 - Can you take a dump of the process in this state and share it?

[Urmeli0815]

Hello @aluhrs13, our customer sent us two dumps:
https://mega.nz/file/HplSVQBb#70QzEBIXpnmqHGuIfTaVmmkHtv0Hfa8t8brMOX5Ol_Q
https://mega.nz/file/qhsWRY7A#DWB0TweSjb5qchzwpIpG5W_oFdF7Lwt5M_YV_9jOH1s

[aluhrs13]

@vbryh-msft can you PTAL while Liang is OOF?

[SanderBouwhuis]

I am the customer @Urmeli0815 mentioned.
The first dump is after waiting about 1.5 mins, and the second dump is after waiting for about 2 mins. It seems there is an initialization error (maybe a dead lock?).
If you need more info, let me know.

[vbryh-msft]

The stacks for main thread are different in both dumps, so it does not looks like deadlock/hung there - dumped process is renderer which does some CSS/JS work.

• Does the app try to navigate to any url when it happens?
• Is there any errors in DevTools console if it is accessible?
• Does the same url work in Edge and Chrome?
• Can we have etw for the issue?

[Urmeli0815]

• The app creates a WebView2 on startup and navigates to a single-page app. After that no more navigation happens.
• DevTools are not available in this build
• The same url works in Edge according to the customer
• @SanderBouwhuis could you make an etw trace? See etw-link from @vbryh-msft

[SanderBouwhuis]

Sorry, we stopped using the application. We switched to something else.
If someone else can also reproduce this, then by all means continue this thread.

Edit:
@Urmeli0815
Ok, I removed the name of the application.

[Urmeli0815]

@SanderBouwhuis No problem, thanks for the initial feedback. Can you do me a favour and remove the reference to our product in your last comment?

@vbryh-msft I propose we close this issue, if we experience something similar I will create a new one.