[Problem/Bug]: WebView2 does not raise Leave event when focus moves to another control (WinForms)

[ViktoriiaUran]

What happened?

What happened?
When using WebView2 in a WinForms application inside a GroupBox (within a SplitContainer),
attaching to the Leave event does not result in the handler being triggered when focus moves to another control (e.g. a TextBox in a different GroupBox).

Expected behavior
The Leave event should fire when WebView2 loses focus.

Actual behavior
The Leave event for WebView2 is not triggered.

Importance

Moderate. My app's user experience is affected, but still usable.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

1.0.1462.37

SDK Version

No response

Framework

Winforms

Operating System

Windows 11

OS Version

No response

Repro steps

1. Create a WinForms form with a SplitContainer.
2. Place a GroupBox in each panel.
3. Place a WebView2 in the first GroupBox and a TextBox in the second.
4. Attach handlers:
   webView21.Leave += WebView21_Leave;
   textBox1.Leave += TextBox1_Leave;
5. Run the app and tab between controls.

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

No, this never worked

Last working version (if regression)

No response

[Navdeep-ss]

can you validate this with latest stable version of webview2 runtime 136.0.3240.64

[ViktoriiaUran]

@Navdeep-ss I've checked with version you've mentioned, it doesn't work too.