Copilot chat shows writting soluttion, then it vanishes at completion #306670
Description
Does this issue occur when all extensions are disabled?: Yes/No
- VS Code Version:
- OS Version:
Steps to Reproduce:
Type: Bug
Using chat in vscode, current using Claude Sonnet 4.5.
Ask it something where it it writing code.
After the thinking phase which then rolles up, the responce starts writing.
You can see the answer being made, once it gets to the end, some of the code blocks vanish. The text remains.
This is an intermittent bug.
The language currently being worked on in Python.
VS Code version: Code 1.113.0 (cfbea10, 2026-03-24T15:07:18+01:00)
OS version: Windows_NT x64 10.0.26200
Modes:
System Info
| Item | Value |
|---|---|
| CPUs | 12th Gen Intel(R) Core(TM) i7-12850HX (24 x 2419) |
| GPU Status | 2d_canvas: enabled GPU0: VENDOR= 0x10de, DEVICE=0x24b9 [NVIDIA RTX A3000 12GB Laptop GPU], DRIVER_VENDOR=NVIDIA, DRIVER_VERSION=32.0.15.8097 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.7309 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 webgl2: enabled webgpu: enabled webnn: disabled_off |
| Load (avg) | undefined |
| Memory (System) | 63.76GB (33.63GB free) |
| Process Argv | --crash-reporter-id 5c14020a-4d83-4ea2-a48f-4082f4628097 |
| Screen Reader | no |
| VM | 0% |
Extensions (20)
| Extension | Author (truncated) | Version |
|---|---|---|
| swagger-viewer | Arj | 3.2.0 |
| markdown-mermaid | bie | 1.32.0 |
| gitlens | eam | 17.11.1 |
| copilot-chat | Git | 0.41.2 |
| bash-ide-vscode | mad | 1.43.0 |
| debugpy | ms- | 2025.18.0 |
| python | ms- | 2026.4.0 |
| vscode-pylance | ms- | 2026.2.1 |
| vscode-python-envs | ms- | 1.24.0 |
| remote-wsl | ms- | 0.104.3 |
| cmake-tools | ms- | 1.22.28 |
| cpp-devtools | ms- | 0.4.6 |
| cpptools | ms- | 1.31.3 |
| cpptools-extension-pack | ms- | 1.5.1 |
| powershell | ms- | 2025.4.0 |
| indent-rainbow | ode | 8.3.1 |
| vscode-yaml | red | 1.21.0 |
| code-spell-checker | str | 4.5.6 |
| code-spell-checker-british-english | str | 1.4.36 |
| markdown-all-in-one | yzh | 3.6.3 |
(1 theme extensions excluded)
A/B Experiments
vsliv368:30146709
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
82j33506:31327384
6abeh943:31336334
envsdeactivate2:31464701
cloudbuttont:31379625
aihoversummaries_t:31469308
3efgi100_wstrepl:31403338
use-responses-api:31390855
je187915:31401257
ec5jj548:31422691
cp_cls_t_966_ss:31454198
4je02754:31466945
8hhj4413:31478653
ge8j1254_inline_auto_hint_haiku:31431912
38bie571_auto:31478677
cp_cls_t_1081:31454832
ia-use-proxy-models-svc:31452481
e9c30283:31461165
test_control1:31471004
ts_provider_enabled:31458190
control_6dc23131:31467998
idci7584:31464702
nes-ftch-new:31485413
showingstats:31481873
534a6447_copy:31478748
nes-extended-on:31455476
chat:31457767
8hig5102:31480529
67jbj424:31484169
bg_compact_t:31481650
c-off:31484755
cpptoolson-v2:31475363
db0gd219:31481871
23c7c724:31484514
po_split_t:31483953
ddid_t:31478206