C# Automatic indentation formatting appears to be broken

Type: Bug

## Issue Description ##

The formatter is now removing indentation automatically in many cases. This started happening today after updating to the latest version of the extension. Indentation works properly if I disable the extension.

Left side is the old behavior.
Right side is the new behavior.
In the video I'm creating a new line, then hitting `Ctrl + Z` to reverse it. You can clearly see that in the new behavior, the indentation comes back after hitting `Ctrl + Z`, indicating that it was there from the start, but then it was removed automatically.

https://github.com/user-attachments/assets/e676362e-ee3b-44b0-b723-6c527f151fd9

## Steps to Reproduce ##

Create a new line inside of a class instance, or when defining enums. It happens elsewhere as well, but those are two easy ways to reproduce.

## Expected Behavior ##

Indentation should be respected.

## Actual Behavior ##

Indentation is completely removed.

Extension version: 2.93.22
VS Code version: Code 1.104.3 (385651c938df8a906869babee516bffd0ddb9829, 2025-10-02T12:30:51.747Z)
OS version: Windows_NT x64 10.0.26100
Modes:

### Logs ###

### C# log ###

```
2025-10-09 10:10:26.409 [info] Locating .NET runtime version 9.0.1
2025-10-09 10:10:27.309 [info] Dotnet path: C:\Program Files\dotnet\dotnet.exe
2025-10-09 10:10:27.309 [info] Activating C# + C# Dev Kit...
2025-10-09 10:10:27.774 [info] [stdout] info: Program[0]
Server started with process ID 26564

2025-10-09 10:10:28.461 [info] [stdout] fail: Microsoft.CodeAnalysis.Remote.ExportProviderBuilder[0]
Encountered errors in the MEF composition:
----- CompositionError level 1 ------
Microsoft.VisualStudio.Copilot.Roslyn.Completion.CSharpReferencedSymbolDefinitionSnippetProvider.ctor(joinableTaskContext): expected exactly 1 export matching constraints:
Contract name: Microsoft.VisualStudio.Threading.JoinableTaskContext
TypeIdentityName: Microsoft.VisualStudio.Threading.JoinableTaskContext
but found 0.
part definition Microsoft.VisualStudio.Copilot.Roslyn.Completion.CSharpReferencedSymbolDefinitionSnippetProvider

Microsoft.VisualStudio.Copilot.Roslyn.Completion.CSharpMemberAccessSymbolBlueprintProvider.ctor(joinableTaskContext): expected exactly 1 export matching constraints:
Contract name: Microsoft.VisualStudio.Threading.JoinableTaskContext
TypeIdentityName: Microsoft.VisualStudio.Threading.JoinableTaskContext
but found 0.
part definition Microsoft.VisualStudio.Copilot.Roslyn.Completion.CSharpMemberAccessSymbolBlueprintProvider

Microsoft.VisualStudio.Copilot.Roslyn.Completion.CSharpMethodCallerBlueprintProvider.ctor(joinableTaskContext): expected exactly 1 export matching constraints:
Contract name: Microsoft.VisualStudio.Threading.JoinableTaskContext
TypeIdentityName: Microsoft.VisualStudio.Threading.JoinableTaskContext
but found 0.
part definition Microsoft.VisualStudio.Copilot.Roslyn.Completion.CSharpMethodCallerBlueprintProvider

Microsoft.CodeAnalysis.ExternalAccess.Copilot.Internal.SemanticSearch.CopilotSemanticSearchQueryExecutor.ctor(workspaceProvider): expected exactly 1 export matching constraints:
Contract name: Microsoft.CodeAnalysis.Host.IHostWorkspaceProvider
TypeIdentityName: Microsoft.CodeAnalysis.Host.IHostWorkspaceProvider
but found 0.
part definition Microsoft.CodeAnalysis.ExternalAccess.Copilot.Internal.SemanticSearch.CopilotSemanticSearchQueryExecutor

Microsoft.CodeAnalysis.ExternalAccess.Copilot.Internal.CodeMapper.CSharpMapCodeService.ctor(service): expected exactly 1 export matching constraints:
Contract name: Microsoft.CodeAnalysis.ExternalAccess.Copilot.CodeMapper.ICSharpCopilotMapCodeService
TypeIdentityName: Microsoft.CodeAnalysis.ExternalAccess.Copilot.CodeMapper.ICSharpCopilotMapCodeService
but found 0.
part definition Microsoft.CodeAnalysis.ExternalAccess.Copilot.Internal.CodeMapper.CSharpMapCodeService

Microsoft.CodeAnalysis.ExternalAccess.Pythia.PythiaSignatureHelpProvider.ctor(implementation): expected exactly 1 export matching constraints:
Contract name: Microsoft.CodeAnalysis.ExternalAccess.Pythia.Api.IPythiaSignatureHelpProviderImplementation
TypeIdentityName: Microsoft.CodeAnalysis.ExternalAccess.Pythia.Api.IPythiaSignatureHelpProviderImplementation
but found 0.
part definition Microsoft.CodeAnalysis.ExternalAccess.Pythia.PythiaSignatureHelpProvider


Microsoft.VisualStudio.Composition.CompositionFailedException: Errors exist in the composition.
at Microsoft.VisualStudio.Composition.CompositionConfiguration.ThrowOnErrors()
at Microsoft.CodeAnalysis.Remote.ExportProviderBuilder.CheckForAndReportCompositionErrors(CompositionConfiguration configuration, ComposableCatalog catalog) in /_/src/Workspaces/Remote/Core/ExportProviderBuilder.cs:line 208

2025-10-09 10:10:29.473 [info] [stdout] {"pipeName":"\\\\.\\pipe\\82d88b9b"}

2025-10-09 10:10:29.473 [info] received named pipe information from server
2025-10-09 10:10:29.501 [info] client has connected to server
2025-10-09 10:10:29.538 [info] [Program] Language server initialized
2025-10-09 10:10:30.239 [info] [textDocument/_vs_getProjectContexts] [Microsoft.CodeAnalysis.LanguageServer.DotnetCliHelper] Using dotnet executable configured on the PATH
2025-10-09 10:10:30.636 [info] [textDocument/_vs_getProjectContexts] [Microsoft.CodeAnalysis.LanguageServer.FileBasedPrograms.FileBasedProgramsProjectSystem] Failed to obtain virtual project for 'c:\Private\Projects\EPiBackend\NWG.Commerce\Data\Export\ApiExport.cs' using dotnet run-api. Falling back to directly creating the virtual project.
2025-10-09 10:10:31.292 [info] [textDocument/_vs_getProjectContexts] [Microsoft.CodeAnalysis.MSBuild.BuildHostProcessManager] .NET BuildHost started from c:\Users\stnalwu1\.vscode\extensions\ms-dotnettools.csharp-2.93.22-win32-x64\.roslyn\Microsoft.CodeAnalysis.LanguageServer.exe reloading to start from C:\Program Files\dotnet\dotnet.exe to match necessary SDK location.
2025-10-09 10:10:33.009 [warning] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Project c:\Private\Projects\EPiBackend\NWG.Commerce\Data\Export\ApiExport.csproj has unresolved dependencies
2025-10-09 10:10:33.082 [info] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Successfully completed load of c:\Private\Projects\EPiBackend\NWG.Commerce\Data\Export\ApiExport.cs
2025-10-09 10:10:33.364 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.Commerce.WebJob\NWG.Commerce.WebJob.csproj loaded by C# Dev Kit
2025-10-09 10:10:33.373 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.Commerce\NWG.Commerce.csproj loaded by C# Dev Kit
2025-10-09 10:10:33.489 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.Azure\NWG.Azure.csproj loaded by C# Dev Kit
2025-10-09 10:10:33.538 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.Commerce.WebJob.Shared\NWG.Commerce.WebJob.Shared.csproj loaded by C# Dev Kit
2025-10-09 10:10:33.810 [error] [workspace/_roslyn_restore] [Microsoft.CodeAnalysis.LanguageServer.Handler.RestoreHandler] Restore completed with errors.
2025-10-09 10:10:33.812 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.Commerce.Identity\NWG.Commerce.Identity.csproj loaded by C# Dev Kit
2025-10-09 10:10:33.815 [info] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:03.6016525
2025-10-09 10:10:34.076 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.Commerce.Microshop\NWG.Commerce.Microshop.csproj loaded by C# Dev Kit
2025-10-09 10:10:34.204 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.Commerce.Test\NWG.Commerce.Test.csproj loaded by C# Dev Kit
2025-10-09 10:10:34.436 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.Commerce.Api\NWG.Commerce.Api.csproj loaded by C# Dev Kit
2025-10-09 10:10:34.447 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.Commerce.ReturnCenter\NWG.Commerce.ReturnCenter.csproj loaded by C# Dev Kit
2025-10-09 10:10:34.699 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Private\Projects\EPiBackend\NWG.CommerceFunction\NWG.CommerceFunction.csproj loaded by C# Dev Kit

```

### C# LSP Trace Logs log ###

```

```

## Environment Information ##
**VSCode version**: 1.104.3
**C# Extension**: 2.93.22
**Using OmniSharp**: false

Dotnet Information
.NET SDK:
Version: 9.0.305
Commit: 3fc74f3529
Workload version: 9.0.300-manifests.6fcb754b
MSBuild version: 17.14.21+8929ca9e3

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26100
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\9.0.305\

.NET workloads installed:
[aspire]
Installation Source: VS 17.14.36518.9
Manifest Version: 8.2.2/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.aspire\8.2.2\WorkloadManifest.json
Install Type: Msi

Configured to use loose manifests when installing new manifests.

Host:
Version: 9.0.9
Architecture: x64
Commit: 893c2ebbd4

.NET SDKs installed:
6.0.428 [C:\Program Files\dotnet\sdk]
9.0.305 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.27 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.27 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

Visual Studio Code Extensions

|Extension|Author|Version|Folder Name|
|---|---|---|---|
|command-server|pokey|0.12.0|pokey.command-server-0.12.0|
|copilot|GitHub|1.372.0|github.copilot-1.372.0|
|copilot-chat|GitHub|0.31.5|github.copilot-chat-0.31.5|
|csdevkit|ms-dotnettools|1.60.2|ms-dotnettools.csdevkit-1.60.2-win32-x64|
|csharp|ms-dotnettools|2.93.22|ms-dotnettools.csharp-2.93.22-win32-x64|
|errorlens|usernamehw|3.26.0|usernamehw.errorlens-3.26.0|
|es7-react-js-snippets|dsznajder|4.4.3|dsznajder.es7-react-js-snippets-4.4.3|
|gitlens|eamodio|17.6.1|eamodio.gitlens-17.6.1|
|indent-rainbow|oderwat|8.3.1|oderwat.indent-rainbow-8.3.1|
|parse-tree|pokey|0.43.0|pokey.parse-tree-0.43.0|
|prettier-vscode|esbenp|11.0.0|esbenp.prettier-vscode-11.0.0|
|pretty-ts-errors|YoavBls|0.6.1|yoavbls.pretty-ts-errors-0.6.1|
|rest-client|humao|0.25.1|humao.rest-client-0.25.1|
|talon|pokey|0.2.0|pokey.talon-0.2.0|
|vscode-dotnet-runtime|ms-dotnettools|2.3.7|ms-dotnettools.vscode-dotnet-runtime-2.3.7|
|vscode-fileutils|sleistner|3.10.3|sleistner.vscode-fileutils-3.10.3|
|vscode-styled-components|styled-components|1.7.8|styled-components.vscode-styled-components-1.7.8|
|vscode-talonscript|mrob95|0.3.24|mrob95.vscode-talonscript-0.3.24|
|vsliveshare|ms-vsliveshare|1.0.5959|ms-vsliveshare.vsliveshare-1.0.5959|;

C# Settings

|Setting|Value|
|---|---|
|preferCSharpExtension|false|
|compilerDiagnosticScope|openFiles|
|analyzerDiagnosticScope|openFiles|
|enableXamlTools|true|
|useServerGC|true|;

System Info

|Item|Value|
|---|---|
|CPUs|13th Gen Intel(R) Core(TM) i7-13800H (20 x 2918)|
|GPU Status|2d_canvas: enabled
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
skia_graphite: disabled_off
trees_in_viz: disabled_off
video_decode: enabled
video_encode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled
webgpu: enabled
webnn: disabled_off|
|Load (avg)|undefined|
|Memory (System)|31.69GB (13.21GB free)|
|Process Argv|C:\\Private\\Projects\\EPiBackend|
|Screen Reader|no|
|VM|0%|