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Cells partially rendered when keyboard scrolling #17156

@chen-uthana

Description

@chen-uthana

Type: Bug

When scrolling a notebook with mouse wheel - everything renders normally. But when using keyboard arrow keys (arrow up, arrow down)- cells are often rendered partially until additional action (e.g. "enter") is performed.

Extension version: 2025.9.1
VS Code version: Code 1.106.2 (1e3c50d64110be466c0b4a45222e81d2c9352888, 2025-11-19T16:56:50.023Z)
OS version: Windows_NT x64 10.0.26100
Modes:
Remote OS version: Linux x64 6.8.0-84-generic

System Info
Item Value
CPUs 13th Gen Intel(R) Core(TM) i7-13650HX (20 x 2803)
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) 15.63GB (0.70GB free)
Process Argv --crash-reporter-id b46e4157-e597-471b-84b2-be22801b84f9
Screen Reader no
VM 0%
Item Value
Remote SSH: chendev
OS Linux x64 6.8.0-84-generic
CPUs Intel(R) Xeon(R) CPU E5-2697 v4 @ 2.30GHz (72 x 1200)
Memory (System) 251.75GB (240.08GB free)
VM 0%
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