Cannot move multi-cell selection within Jupyter notebook using alt+up/down arrows

[stephenfrost]

Type: Bug

Steps to reproduce:

1. Select a Jupyter notebook cell.
2. Hold down Shift key and press up or down arrow so that at least one other adjacent cell is included in the selection. Release all keys.
3. Hold down the alt key and press up or down arrow.

What should happen (and did happen in previous versions of VS Code):
The entire group of cells should move up or down within the notebook.

What actually happens:
Only the cell most recently added to the selection moves up or down within the notebook.

VS Code version: Code 1.93.1 (38c31bc, 2024-09-11T17:20:05.685Z)
OS version: Windows_NT x64 10.0.22631
Modes:

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-10850H CPU @ 2.70GHz (12 x 2712)
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)	31.59GB (16.79GB free)
Process Argv	--crash-reporter-id 6da36b66-3389-48e8-a214-5315ee104636
Screen Reader	no
VM	0%

Extensions (32)

Extension	Author (truncated)	Version
gitlens	eam	15.5.1
copilot	Git	1.230.0
copilot-chat	Git	0.20.1
gitlab-workflow	Git	5.11.0
git-graph	mhu	1.30.0
vscode-docker	ms-	1.29.2
vscode-dotnet-runtime	ms-	2.1.5
data-workspace-vscode	ms-	0.5.0
mssql	ms-	1.24.0
sql-bindings-vscode	ms-	0.4.0
sql-database-projects-vscode	ms-	1.4.3
autopep8	ms-	2024.0.0
debugpy	ms-	2024.10.0
python	ms-	2024.14.1
vscode-pylance	ms-	2024.9.1
datawrangler	ms-	1.8.1
jupyter	ms-	2024.8.1
jupyter-keymap	ms-	1.1.2
jupyter-renderers	ms-	1.0.19
vscode-ai	ms-	1.0.0
vscode-ai-remote	ms-	1.0.0
vscode-jupyter-cell-tags	ms-	0.1.9
vscode-jupyter-powertoys	ms-	0.1.1
vscode-jupyter-slideshow	ms-	0.1.6
remote-containers	ms-	0.384.0
remote-ssh	ms-	0.114.3
remote-ssh-edit	ms-	0.86.0
remote-wsl	ms-	0.88.3
remote-explorer	ms-	0.4.3
remote-server	ms-	1.5.2
vscode-speech	ms-	0.10.0
vscode-yaml	red	1.15.0

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