Terminal scrollbar moves to the top after running command

[joshka]

Type: Bug

Unsure of the exact steps, this happens intermittently (but frequently) after running various commands - e.g. cargo.

After a command runs, the scollbar is set to the top most location, but the location of the view isn't aligned to the scrollbar location. This makes it impossible to scroll up to see the previous information of the command without first scrolling all the way to the bottom or by hitting enter to make the terminal jump to the next line.

VS Code version: Code 1.98.1 (2fc07b8, 2025-03-10T15:38:08.854Z)
OS version: Darwin arm64 24.3.0
Modes:

System Info

Item	Value
CPUs	Apple M2 Max (12 x 2400)
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 webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	2, 2, 3
Memory (System)	96.00GB (22.73GB free)
Process Argv	--log rust-lang.rust-analyzer=debug --crash-reporter-id f8fdf478-fe1f-41da-ba33-7aee2edd6a96
Screen Reader	no
VM	0%

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(3 theme extensions excluded)

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[vs-code-engineering]

Thanks for creating this issue! It looks like you may be using an old version of VS Code, the latest stable release is 1.98.2. Please try upgrading to the latest version and checking whether this issue remains.

Happy Coding!

[joshka]

Will monitor and reopen if this happens in 1.98.2

[joshka]

Still appears to be a problem in 1.98.2

[meganrogge]

a gif would help

[joshka]

a gif would help

I'll grab one next time it happens, and I'll try find some ways to reliably trigger it. Running cargo or bacon in the terminal are things which sometimes make this happen.

[meganrogge]

sounds good

[evolbug]

I've stumbled upon this and recorded a replication. I suspect it's something to do with ANSI escape code use / tty nesting breaking scroll position restoration under some circumstances.

Replicates reliably for me using docker+alpine+htop.

Commands:

docker run --rm -it alpine:3.21 sh
apk add htop
htop

issue.mp4

[joshka]

Yeah, I'm a maintainer of Ratatui (a rust TUI framework), and regularly run tuis in the terminal that set raw mode and enter the alternate screen, as well as move the cursor regularly. They generally reset the terminal back to cooked state and leave the alternate screen on exit. These are likely to be confounding factors, but I haven't yet seen a reproduceable problem at a time where I can make a note of it yet. Still watching though.

[Tyriar]

/duplicate #224750