[Problem/Bug]: Opening the find toolbar in the WebView2 control and then repeatedly clicking between the find toolbar and the hosting WPF window causes the entire application window to become unresponsive / freeze.

What happened?

When the search bar is opened in the WebView2 control, switching the mouse back and forth between the search bar and the WPF window causes the entire window to freeze.

This issue is reproducible in the official WebView2 Win32/WPF sample and has been previously mentioned in Issue #1727、#5504

Importance

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

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

150.0.4078.65、125.0.2535.85

SDK Version

No response

Framework

WPF

Operating System

Windows 10

OS Version

No response

Repro steps

1. Open a WPF application that hosts a WebView2 control, then press Ctrl+F to open the find toolbar.

2. Alternate clicking between the find toolbar and the WPF window area right next to it.

3. After performing this back-and-forth clicking several times, the entire WPF window becomes unresponsive / freezes.

4. The freeze can be temporarily resolved by:

   Pressing Alt+Tab to switch focus away and back,

   Minimizing and then restoring the window,

   Or triggering a system-modal MessageBox via a custom shortcut key.

Once recovered, all the queued mouse/keyboard inputs are processed at once.

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Don't know

Last working version (if regression)

No response

Start with the official WebView2 Win32/WPF sample and reproduce the freeze by pressing Ctrl+F, then alternating clicks between the find toolbar and adjacent WPF window area. Done means repeated switching no longer makes the window unresponsive, and queued mouse and keyboard input is not delayed until recovery.