When 'Use previous version of Microsoft Pinyin Input Method' is enabled, the input method malfunctions.

[a690089735]

Type: Bug

When 'Use previous version of Microsoft Pinyin Input Method' is enabled, the input method malfunctions. The candidate box has a high probability of failing to display, and page turning, number keys, and other candidate word operation keys also don't work.
Attached a screen recording.

default.mp4

VS Code version: Code 1.101.1 (18e3a1e, 2025-06-18T13:35:12.605Z)
OS version: Windows_NT x64 10.0.19045
Modes:

System Info

Item	Value
CPUs	13th Gen Intel(R) Core(TM) i5-13600KF (20 x 3494)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on 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 video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	63.72GB (27.34GB free)
Process Argv	--crash-reporter-id 2c569e1d-f563-493c-86b0-0cd288ff56a6
Screen Reader	no
VM	0%

Extensions (32)

Extension	Author (truncated)	Version
tongyi-lingma	Ali	2.5.13
shaderlabvscodefree	aml	1.3.6
language-maxscript	ate	2.1.3
blamer-vs	bea	0.7.3
gitlens	eam	17.2.0
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isort	ms-	2025.1.11191009
python	ms-	2025.9.2025062001
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vscode-jupyter-slideshow	ms-	0.1.6
remote-ssh	ms-	0.120.0
remote-ssh-edit	ms-	0.87.0
cmake-tools	ms-	1.20.53
cpptools	ms-	1.26.2
cpptools-extension-pack	ms-	1.3.1
hexeditor	ms-	1.11.1
remote-explorer	ms-	0.5.0
pdf	tom	1.2.2
cmake	twx	0.0.17
vstuc	vis	1.1.2

(1 theme extensions excluded)

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[tamuratak]

Duplicate of #251518

[aiday-mar]

Hi thanks for filing this issue. This is happening because you are using the EditContext API with the old Microsoft Chinese Windows IME. You can do one of the following:

• Turn off editor.experimentalEditContextEnabled or editor.editContext
• Upgrade to the new Microsoft Chinese Windows IME