Blazor server, UICulture set on first instantiation is remembered after user sets new culture

[gy6248]

Bug description

Pages (or components) are rendered in the wrong language.

In an app with several languages, after the user changes the language, pages that trigger
new rendering based on external events can cause the page to be rendered with the previous language setting that was current
when the external events were first set up.

This can make the page language flicker between two languages if page is also rendered based on user interaction.
If it is not, the page will appear stuck in the wrong language.

The first rendering is made in the correct language, but following a new rendering triggered by an external event the language is set based on the event. Changing the CurrentUICulture just before invoking StateHasChanged will correct this, but that has to be done every time.

To Reproduce

(https://github.com/SandvikTeeness/Blazor.UICulture.Bug)

The bug is demonstrated on the Counter page by using a timer placed on the WeatherForecastService.

1. Start the timer with the button on the home page
2. Change to another language
3. Go to the Counter page and click the button
4. For each click, wait a second or two. The timer is set up to call its' event each 2 seconds.

I expect you to see the language flicker between the first you had when starting the app, and the language you have chosen as current.

Further technical details

• ASP.NET Core version:
• The IDE (VS / VS Code/ VS4Mac) you're running on, and its version:
• Include the output of dotnet --info:

dotnet --info Output

.NET SDK (reflecting any global.json):
 Version:   5.0.402
 Commit:    e9d3381880

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.19043
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\5.0.402\

Host (useful for support):
  Version: 5.0.11
  Commit:  f431858f8b

.NET SDKs installed:
  5.0.102 [C:\Program Files\dotnet\sdk]
  5.0.302 [C:\Program Files\dotnet\sdk]
  5.0.402 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 3.1.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.1.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET runtimes or SDKs:
  https://aka.ms/dotnet-download
  

Visual Studio -> Copy Info

Microsoft Visual Studio Professional 2019
Version 16.11.5
VisualStudio.16.Release/16.11.5+31729.503
Microsoft .NET Framework
Version 4.8.04084

Installed Version: Professional

Visual C++ 2019   00435-60000-00000-AA225
Microsoft Visual C++ 2019

ADL Tools Service Provider   1.0
This package contains services used by Data Lake tools

ASA Service Provider   1.0

ASP.NET and Web Tools 2019   16.11.75.64347
ASP.NET and Web Tools 2019

ASP.NET Web Frameworks and Tools 2019   16.11.75.64347
For additional information, visit https://www.asp.net/

Azure App Service Tools v3.0.0   16.11.75.64347
Azure App Service Tools v3.0.0

Azure Data Lake Node   1.0
This package contains the Data Lake integration nodes for Server Explorer.

Azure Data Lake Tools for Visual Studio   2.6.1000.0
Microsoft Azure Data Lake Tools for Visual Studio

Azure Functions and Web Jobs Tools   16.11.75.64347
Azure Functions and Web Jobs Tools

Azure Stream Analytics Tools for Visual Studio   2.6.1000.0
Microsoft Azure Stream Analytics Tools for Visual Studio

C# Tools   3.11.0-4.21403.6+ae1fff344d46976624e68ae17164e0607ab68b10
C# components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Common Azure Tools   1.10
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Cookiecutter   16.11.21196.2
Provides tools for finding, instantiating and customizing templates in cookiecutter format.

Fabric.DiagnosticEvents   1.0
Fabric Diagnostic Events

GitHub.VisualStudio   2.11.106.19330
A Visual Studio Extension that brings the GitHub Flow into Visual Studio.

IntelliCode Extension   1.0
IntelliCode Visual Studio Extension Detailed Info

Microsoft Azure HDInsight Azure Node   2.6.1000.0
HDInsight Node under Azure Node

Microsoft Azure Hive Query Language Service   2.6.1000.0
Language service for Hive query

Microsoft Azure Service Fabric Tools for Visual Studio   16.10
Microsoft Azure Service Fabric Tools for Visual Studio

Microsoft Azure Stream Analytics Language Service   2.6.1000.0
Language service for Azure Stream Analytics

Microsoft Azure Stream Analytics Node   1.0
Azure Stream Analytics Node under Azure Node

Microsoft Azure Tools for Visual Studio   2.9
Support for Azure Cloud Services projects

Microsoft Continuous Delivery Tools for Visual Studio   0.4
Simplifying the configuration of Azure DevOps pipelines from within the Visual Studio IDE.

Microsoft JVM Debugger   1.0
Provides support for connecting the Visual Studio debugger to JDWP compatible Java Virtual Machines

Microsoft Library Manager   2.1.113+g422d40002e.RR
Install client-side libraries easily to any web project

Microsoft MI-Based Debugger   1.0
Provides support for connecting Visual Studio to MI compatible debuggers

Microsoft Visual C++ Wizards   1.0
Microsoft Visual C++ Wizards

Microsoft Visual Studio Tools for Containers   1.2
Develop, run, validate your ASP.NET Core applications in the target environment. F5 your application directly into a container with debugging, or CTRL + F5 to edit & refresh your app without having to rebuild the container.

Microsoft Visual Studio VC Package   1.0
Microsoft Visual Studio VC Package

Node.js Tools   1.5.30526.3 Commit Hash:c09c81113bcbc86d57943fcdd67e82434263d61d
Adds support for developing and debugging Node.js apps in Visual Studio

NuGet Package Manager   5.11.0
NuGet Package Manager in Visual Studio. For more information about NuGet, visit https://docs.nuget.org/

ProjectServicesPackage Extension   1.0
ProjectServicesPackage Visual Studio Extension Detailed Info

Python   16.11.21196.2
Provides IntelliSense, projects, templates, debugging, interactive windows, and other support for Python developers.

Python - Conda support   16.11.21196.2
Conda support for Python projects.

Python - Django support   16.11.21196.2
Provides templates and integration for the Django web framework.

Python - Profiling support   16.11.21196.2
Profiling support for Python projects.

Razor (ASP.NET Core)   16.1.0.2122504+13c05c96ea6bdbe550bd88b0bf6cdddf8cde1725
Provides languages services for ASP.NET Core Razor.

ResXManager   ResXManager
Manage localization of all ResX-Based resources in one place. Shows all resources of a solution and let's you edit the strings and their localizations in a well-arranged data grid.

SQL Server Data Tools   16.0.62107.28140
Microsoft SQL Server Data Tools

SQLite & SQL Server Compact Toolbox   4.8
SQLite & SQL Server Compact Toolbox adds scripting, import, export, rename, query execution and much more to SQL Server Compact & SQLite Data Connections.

Test Adapter for Boost.Test   1.0
Enables Visual Studio's testing tools with unit tests written for Boost.Test.  The use terms and Third Party Notices are available in the extension installation directory.

Test Adapter for Google Test   1.0
Enables Visual Studio's testing tools with unit tests written for Google Test.  The use terms and Third Party Notices are available in the extension installation directory.

ToolWindowHostedEditor   1.0
Hosting json editor into a tool window

TypeScript Tools   16.0.30526.2002
TypeScript Tools for Microsoft Visual Studio

Visual Basic Tools   3.11.0-4.21403.6+ae1fff344d46976624e68ae17164e0607ab68b10
Visual Basic components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Visual F# Tools   16.11.0-beta.21322.6+488cc578cafcd261d90d748d8aaa7b8b091232dc
Microsoft Visual F# Tools

Visual Studio Code Debug Adapter Host Package   1.0
Interop layer for hosting Visual Studio Code debug adapters in Visual Studio

Visual Studio Container Tools Extensions   1.0
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Visual Studio Tools for CMake   1.0
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Visual Studio Tools for Containers

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WiX Toolset Visual Studio Extension   1.0.0.4
WiX Toolset Visual Studio Extension version 1.0.0.4
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[mkArtakMSFT]

Thanks for contacting us. This is a dupe of #28521

[TanayParikh]

Thanks for reaching out. For now you can use a workaround that was posted in the duplicated issue:

#28521 (comment)