Element in WebView would lose focus when cursor moves out WebView area

[alengYuan]

Description Elements in WebView would lose focus when cursor moves out WebView area, but in Edge, it would not happen:

In most cases, this issue would not be important, but while using ::-webkit-scrollbar in CSS to custom the style of scrollbar in web page, this issue would be unbearable because it would affect the normal use of scrollbar.

Version SDK: Microsoft.WindowsAppSDK 1.3.230602002 Runtime: 114.0.1823.51 Framework: WinUI 3 OS: Windows 11 Pro 22621.1848

Regression Was this working before but has regressed? no

Repro Steps

1. Create one empty project with WebView 2 through Template Studio;
2. Create one local HTML file to be mapped, or just open codepen.io;
3. Input the code from the screenshot as content;
4. Operate as shown in the screenshot.

Expected behavior: second screenshot Actual behavior: first screenshot

[alengYuan]

In most cases, this issue would not be important, but while using ::-webkit-scrollbar in CSS to custom the style of scrollbar in web page, this issue would be unbearable because it would affect the normal use of scrollbar.