MAUI Blazor cannot switch Chinese input language

Description

I am using Visual Studio 2022 Community version for development in a Win11 Chinese environment, with Microsoft Pinyin as my input method. I always keep Microsoft Pinyin open, as it’s my default input method, allowing me to switch between Chinese and English using the SHIFT key. By default, English input is enabled.

I have found that when using internal links in Blazor, there are no issues. However, when I use BlazorWebView to open external links, it causes problems. However, there are no exceptions thrown.

Steps to Reproduce

I have tested two scenarios:

Cannot switch to Chinese input method

1. Open the BlazorWebView page, with the default input method set to English.
2. Click on an external link with an address like https://aaa.com/. Use the BlazorWebView.UrlLoading callback to set UrlLoadingEventArgs.UrlLoadingStrategy = UrlLoadingStrategy.OpenInWebView to ensure the page opens in the BlazorWebView. The input method already locked that you can’t switch to Chinese mode.
3. Perform a series of actions, then return to https://0.0.0.0/... in same BlazorWebView.
4. At this point, Microsoft Pinyin cannot switch to Chinese input mode using the SHIFT key.

Can switch to Chinese input method

1. Open the BlazorWebView page, with the default input method set to English. At this point, switch to Chinese input mode.
2. Click on an external link with an address like https://aaa.com/. Use the BlazorWebView.UrlLoading callback to set UrlLoadingEventArgs.UrlLoadingStrategy = UrlLoadingStrategy.OpenInWebView to ensure the page opens in the BlazorWebView. And Chinese input mode is kept at this moment. Switch between Chinese and English mode is working as expected.
3. Perform a series of actions, then return to https://0.0.0.0/... in same BlazorWebView.
4. At this point, Microsoft Pinyin can switch between English and Chinese input mode using the SHIFT key.

Link to public reproduction project repository

https://github.com/Jennal/MAUIBlazorInputBug

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

net7.0-windows10.0.19041.0

Did you find any workaround?

No response

Relevant log output

No response

[Jennal]

Did you try this using WinUI and its built-in WebView?

Not yet, I would try next week.

[msftbot[bot]]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment. If it is closed, feel free to comment when you are able to provide the additional information and we will re-investigate.