Agent session is gone

Type: Bug

If I start long running prompt and try to open previous session, curently running session is gone from sessions list despite it's still can be found via palette.

VS Code version: Code 1.131.0 (e4c7e7b1d6d060162f4aa7f8225271b67ce1df75, 2026-07-28T10:51:25Z)
OS version: Windows_NT x64 10.0.26200
Modes:

System Info

|Item|Value|
|---|---|
|CPUs|11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz (8 x 2995)|
|GPU Status|2d_canvas: enabled
GPU0: VENDOR= 0x8086, DEVICE=0x9a49 [Intel(R) Iris(R) Xe Graphics], DRIVER_VENDOR=Intel, DRIVER_VERSION=32.0.101.7085 *ACTIVE*
GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.8875
Machine model name:
Machine model version:
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
webgl: enabled
webgpu: enabled
webnn: disabled_off|
|Load (avg)|undefined|
|Memory (System)|31.50GB (15.43GB free)|
|Process Argv|--folder-uri file:///c%3A/sources/LocalProjects/assistant.net.dynamics --crash-reporter-id 9cdca50b-9dbf-4f2f-9382-af7f59dd6b48|
|Screen Reader|no|
|VM|0%|
Extensions (75)

Name|Identifier|Author|Version
---|---|---|---
codemie|ai-run-codemie.codemie|ai-run-codemie|1.0.7
NuGet Package Manager GUI|aliasadidev.nugetpackagemanagergui|aliasadidev|2.1.1
Django|batisteo.vscode-django|batisteo|1.15.0
Markdown Preview Github Styling|bierner.markdown-preview-github-styles|bierner|2.2.0
markdownlint|davidanson.vscode-markdownlint|DavidAnson|0.62.0
Docker DX|docker.docker|docker|0.18.0
Python Environment Manager (deprecated)|donjayamanne.python-environment-manager|donjayamanne|1.2.7
Python Extension Pack|donjayamanne.python-extension-pack|donjayamanne|1.7.0
GitLens — Git supercharged|eamodio.gitlens|eamodio|18.3.0
EditorConfig|editorconfig.editorconfig|EditorConfig|0.18.2
Prettier - Code formatter|esbenp.prettier-vscode|esbenp|12.4.0
vscode-solution-explorer|fernandoescolar.vscode-solution-explorer|fernandoescolar|0.9.7
GitHub Actions|github.vscode-github-actions|github|0.32.3
GitHub Pull Requests|github.vscode-pull-request-github|GitHub|0.162.0
Draw.io Integration|hediet.vscode-drawio|hediet|1.9.0
REST Client|humao.rest-client|humao|0.25.1
C# by ReSharper|jetbrains.resharper-code|JetBrains|2026.2.0
NuGet Package Manager|jmrog.vscode-nuget-package-manager|jmrog|1.1.6
CMake Language Support|josetr.cmake-language-support-vscode|josetr|0.0.9
C# XML Documentation Comments|k--kato.docomment|k--kato|1.0.2
Python Indent|kevinrose.vsc-python-indent|KevinRose|1.21.0
Mermaid|mermaidchart.vscode-mermaid-chart|MermaidChart|2.7.4
Prettify JSON|mohsen1.prettify-json|mohsen1|0.0.3
Azure Load Testing|ms-azure-load-testing.microsoft-testing|ms-azure-load-testing|0.2.0
Azure Developer CLI|ms-azuretools.azure-dev|ms-azuretools|0.10.0
GitHub Copilot for Azure|ms-azuretools.vscode-azure-github-copilot|ms-azuretools|1.0.209
Azure MCP Server|ms-azuretools.vscode-azure-mcp-server|ms-azuretools|2.0.46
Azure App Service|ms-azuretools.vscode-azureappservice|ms-azuretools|0.27.0
Azure Container Apps|ms-azuretools.vscode-azurecontainerapps|ms-azuretools|0.11.2
Azure Functions|ms-azuretools.vscode-azurefunctions|ms-azuretools|1.22.0
Azure Resources|ms-azuretools.vscode-azureresourcegroups|ms-azuretools|0.12.7
Azure Static Web Apps|ms-azuretools.vscode-azurestaticwebapps|ms-azuretools|0.13.3
Azure Storage|ms-azuretools.vscode-azurestorage|ms-azuretools|0.17.2
Azure Virtual Machines|ms-azuretools.vscode-azurevirtualmachines|ms-azuretools|0.6.11
Container Tools|ms-azuretools.vscode-containers|ms-azuretools|2.4.5
Azure Cosmos DB|ms-azuretools.vscode-cosmosdb|ms-azuretools|0.34.0
C# Dev Kit|ms-dotnettools.csdevkit|ms-dotnettools|3.20.199
GitHub Copilot upgrade|ms-dotnettools.upgrade-agent|ms-dotnettools|1.1.247
GitHub Copilot modernization for .NET|ms-dotnettools.vscode-dotnet-modernize|ms-dotnettools|1.0.1161
.NET Install Tool|ms-dotnettools.vscode-dotnet-runtime|ms-dotnettools|3.1.0
Kubernetes|ms-kubernetes-tools.vscode-kubernetes-tools|ms-kubernetes-tools|1.4.1
Python Debugger|ms-python.debugpy|ms-python|2026.6.0
isort|ms-python.isort|ms-python|2026.6.0
Pylint|ms-python.pylint|ms-python|2026.6.0
Python|ms-python.python|ms-python|2026.4.0
Pylance|ms-python.vscode-pylance|ms-python|2026.3.1
Python Environments|ms-python.vscode-python-envs|ms-python|1.36.0
Semantic Kernel Tools|ms-semantic-kernel.semantic-kernel|ms-semantic-kernel|0.13.0
Jupyter|ms-toolsai.jupyter|ms-toolsai|2025.9.1
Jupyter Keymap|ms-toolsai.jupyter-keymap|ms-toolsai|1.1.2
Jupyter Notebook Renderers|ms-toolsai.jupyter-renderers|ms-toolsai|1.3.0
Jupyter Cell Tags|ms-toolsai.vscode-jupyter-cell-tags|ms-toolsai|0.1.9
Jupyter Slide Show|ms-toolsai.vscode-jupyter-slideshow|ms-toolsai|0.1.6
CMake Tools|ms-vscode.cmake-tools|ms-vscode|1.23.52
C/C++ DevTools|ms-vscode.cpp-devtools|ms-vscode|0.5.13
C/C++|ms-vscode.cpptools|ms-vscode|1.33.5
C/C++ Extension Pack|ms-vscode.cpptools-extension-pack|ms-vscode|1.5.1
Makefile Tools|ms-vscode.makefile-tools|ms-vscode|0.12.17
PowerShell|ms-vscode.powershell|ms-vscode|2025.4.0
Visual Studio Keymap|ms-vscode.vs-keybindings|ms-vscode|0.2.1
Chat Customizations Evaluations|ms-vscode.vscode-chat-customizations-evaluations|ms-vscode|1.0.8
Azure Tools|ms-vscode.vscode-node-azure-pack|ms-vscode|1.8.2
Serial Monitor|ms-vscode.vscode-serial-monitor|ms-vscode|0.13.1
Foundry Toolkit for VS Code|ms-windows-ai-studio.windows-ai-studio|ms-windows-ai-studio|1.6.6
autoDocstring - Python Docstring Generator|njpwerner.autodocstring|njpwerner|0.6.1
indent-rainbow|oderwat.indent-rainbow|oderwat|8.3.1
YAML|redhat.vscode-yaml|redhat|1.24.0
Prettier ESLint|rvest.vs-code-prettier-eslint|rvest|6.0.0
Code Spell Checker|streetsidesoftware.code-spell-checker|streetsidesoftware|4.5.6
Error Lens|usernamehw.errorlens|usernamehw|3.28.0
GitHub Copilot modernization|vscjava.migrate-java-to-azure|vscjava|1.22.0
vscode-icons|vscode-icons-team.vscode-icons|vscode-icons-team|12.19.0
Jinja|wholroyd.jinja|wholroyd|0.0.8
Clang-Format|xaver.clang-format|xaver|1.9.0
Markdown All in One|yzhang.markdown-all-in-one|yzhang|3.6.3

A/B Experiments

```
vsliv368cf:30146710
vswsl492:30256859
pythonvspyt551cf:31249601
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
envsactivate1:31551504
478i5457:31544283
cloudbuttont:31379625
3efgi100_wstrepl:31403338
ec5jj548:31422691
cp_cls_t_966_ss:31526232
4je02754:31466945
8hhj4413:31478653
ge8j1254_inline_auto_hint_haiku:31490510
cp_cls_c_1081:31454833
conptydll_true:31498968
e9c30283:31461165
test_control1:31471004
c9b86496:31447327
capico_a_098a3278:31555650
idci7584:31464702
e3e4d672:31494082
ei9d7968:31496641
nes-extended-on:31455476
chat:31457767
8hig5102:31480529
89g7j272:31518289
7e187181:31503455
i2gc6536:31499202
52612955:31516516
ghj88844:31499326
ddid_c:31478207
hmra_i5g22:31518061
7df3h592:31512476
cp_cls_t_1082:31535311
logging_enabled_new:31498466
j0d79568:31499440
jb_cp_cls_t_632:31543129
56dj4588:31512888
32d76977:31512328
ha629193:31508444
cdk-lw-on:31524445
f9bf7985:31543584
a1ije391_t:31540920
hgf2d445:31529595
41836166:31537719
jbcp_cls_pctr_t:31531130
61138546:31518536
cp_intellij_t_nes:31548657
d7b18187:31526828
nes-curr-leftover-1500:31538366
ahp-both-windows:31556933
h561g132:31533256
session_8:31532895
ihg5j128:31534457
f412h606:31551416
7g2b5551:31542111
5fe6f778:31554331
allow-none:31555437
fd5dc207:31551400
c7c27ce7:31554789
8hc4g144:31558143
1532g621_copy:31554320
treatment-23-1:31555779
unuse_dynamic_mcp:31555281
session-archive:31558132

```