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Claude CLI lags when scrolling after VS Code update, text copy unavailable in standalone window #320884

Description

@loong4-china

Type: Bug

Steps to Reproduce

  1. Reproduction Steps
    Update Visual Studio Code to the latest official version.
    Install and launch the Claude CLI integrated terminal inside VS Code.
    Scroll up/down through long conversation history in the Claude CLI panel.
    Open Claude CLI in its separate standalone floating window, try to select text with mouse to copy content.
  2. Actual Result
    Scrolling the chat content in Claude CLI has severe lag and stuttering after the VS Code upgrade, scrolling response is very slow.
    When using the independent floating window of Claude CLI: cannot select any text with mouse drag, so copying text is impossible.
  3. Expected Result
    Smooth, lag-free scrolling when browsing Claude CLI chat history.
    Normal mouse text selection and copy functionality working properly in the standalone Claude CLI window.

VS Code version: Code 1.123.2 (3c631b164c239e7aeaaae7c626b46c527b361af2, 2026-06-09T15:06:40-07:00)
OS version: Windows_NT x64 10.0.26200
Modes:
Remote OS version: Linux x64 6.6.87.2-microsoft-standard-WSL2
Remote OS version: Linux x64 6.6.87.2-microsoft-standard-WSL2

System Info
Item Value
CPUs Intel(R) Core(TM) Ultra 9 285H (16 x 3686)
GPU Status 2d_canvas: enabled
GPU0: VENDOR= 0x8086, DEVICE=0x7d51 [Intel(R) Arc(TM) 140T GPU (16GB)], DRIVER_VENDOR=Intel, DRIVER_VERSION=32.0.101.7026 ACTIVE
GPU1: VENDOR= 0x10de, DEVICE=0x2d19 [NVIDIA GeForce RTX 5060 Laptop GPU], DRIVER_VERSION=32.0.15.7705
GPU2: VENDOR= 0x8086, DEVICE=0x7d51 [Intel(R) Arc(TM) 140T GPU (16GB)], DRIVER_VERSION=32.0.101.7026
GPU3: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.8521
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) 31.43GB (9.04GB free)
Process Argv --crash-reporter-id 73f5ac88-3caa-4dea-9580-3d9efb2ba79a
Screen Reader yes
VM 0%
Item Value
Remote WSL: Ubuntu-24.04
OS Linux x64 6.6.87.2-microsoft-standard-WSL2
CPUs Intel(R) Core(TM) Ultra 9 285H (16 x 0)
Memory (System) 15.34GB (8.58GB free)
VM 0%
Item Value
Remote WSL: Ubuntu-24.04
OS Linux x64 6.6.87.2-microsoft-standard-WSL2
CPUs Intel(R) Core(TM) Ultra 9 285H (16 x 0)
Memory (System) 15.34GB (8.58GB free)
VM 0%
Extensions (36)
Name Identifier Author Version
豆包应用共享插件 doubao.doubao-app-share-vscode-plugin Doubao 0.1.2
Python Indent kevinrose.vsc-python-indent KevinRose 1.21.0
Jupyter Keymap ms-toolsai.jupyter-keymap ms-toolsai 1.1.2
Dev Containers ms-vscode-remote.remote-containers ms-vscode-remote 0.459.1
Remote - SSH ms-vscode-remote.remote-ssh ms-vscode-remote 0.124.0
Remote - SSH: Editing Configuration Files ms-vscode-remote.remote-ssh-edit ms-vscode-remote 0.87.0
WSL ms-vscode-remote.remote-wsl ms-vscode-remote 0.104.3
Remote Explorer ms-vscode.remote-explorer ms-vscode 0.5.0
vscode-pdf tomoki1207.pdf tomoki1207 1.2.2
Jinja wholroyd.jinja wholroyd 0.0.8
Qoder CN (Formerly Lingma) - Alibaba Cloud AI Agentic Coding Platform alibaba-cloud.tongyi-lingma Alibaba-Cloud 2.6.1
Claude Code for VS Code anthropic.claude-code Anthropic 2.1.172
File Watcher appulate.filewatcher appulate 2.0.0
Django batisteo.vscode-django batisteo 1.15.0
Python Environment Manager (deprecated) donjayamanne.python-environment-manager donjayamanne 1.2.7
Python Extension Pack donjayamanne.python-extension-pack donjayamanne 1.7.0
Python Indent kevinrose.vsc-python-indent KevinRose 1.21.0
TRAE AI: Coding Assistant marscode.marscode-extension MarsCode 1.6.38
Rainbow CSV mechatroner.rainbow-csv mechatroner 3.24.1
Git Graph mhutchie.git-graph mhutchie 1.30.0
Container Tools ms-azuretools.vscode-containers ms-azuretools 2.4.5
Python Debugger ms-python.debugpy ms-python 2026.6.0
Python ms-python.python ms-python 2026.4.0
Pylance ms-python.vscode-pylance ms-python 2026.2.1
Python Environments ms-python.vscode-python-envs ms-python 1.30.0
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 1.32.2
C/C++ Extension Pack ms-vscode.cpptools-extension-pack ms-vscode 1.5.1
Chat Customizations Evaluations ms-vscode.vscode-chat-customizations-evaluations ms-vscode 1.0.6
autoDocstring - Python Docstring Generator njpwerner.autodocstring njpwerner 0.6.1
Codex – OpenAI’s coding agent openai.chatgpt openai 26.602.71036
Even Better TOML tamasfe.even-better-toml tamasfe 0.21.2
Jinja wholroyd.jinja wholroyd 0.0.8
Markdown All in One yzhang.markdown-all-in-one yzhang 3.6.3
json zainchen.json ZainChen 2.0.2
A/B Experiments
vsliv368cf:30146710
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
6abeh943:31336334
envsdeactivate2:31505458
cloudbuttont:31379625
3efgi100_wstrepl:31403338
839jf696:31457053
ec5jj548:31422691
cp_cls_t_966_ss:31526232
4je02754:31466945
8hhj4413:31478653
38bie571_auto:31426784
cp_cls_c_1081:31454833
conptydll_true:31498968
ia-use-proxy-models-svc:31452481
e9c30283:31461165
test_treatment2:31471001
46204921:31447328
idci7584:31464702
e3e4d672:31494082
ei9d7968:31496641
chat:31457767
8hig5102:31480529
89g7j272:31518289
7e187181:31503455
i2gc6536:31499202
52612955:31516516
ghj88844:31499326
ec1eg703:31520046
ddid_c:31478207
hmra_i5g22:31518061
7df3h592:31512476
cp_cls_t_1082:31516087
logging_enabled_new:31498466
db5d2638:31499441
nes-extended-cfe-himalia-004:31500446
jb_cp_cls_c_632:31524806
748c7209:31512887
32d76977:31512328
ha629193:31508444
cdk-lw-on:31524445
nes-charagree-3:31521372
2cfga817_c:31522397
jbcp_cls_pctr_t:31530434
61138546:31518536
nes-global-3k:31525691
d7b18187:31526828

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