Can't Scroll to the Bottom of Terminal

[sroyal-statsig]

Issue Type: Bug

1. Create enough output in the terminal to make it scroll
2. Scroll up and down a few times until when scrolling down you can't see the prompt

VS Code version: Code - Insiders 1.56.0-insider (Universal) (845efe5, 2021-04-09T09:50:42.652Z)
OS version: Darwin arm64 20.3.0

System Info

Item	Value
CPUs	undefined
GPU Status	2d_canvas: enabled gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on protected_video_decode: unavailable_off rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled webgl: enabled webgl2: enabled
Load (avg)	1, 2, 2
Memory (System)	16.00GB (0.59GB free)
Process Argv	--crash-reporter-id 51d7ad4a-5576-4fe7-8654-0a9d6ee53080
Screen Reader	no
VM	0%

Extensions (14)

Extension	Author (truncated)	Version
vscode-eslint	dba	2.1.19
gitlens	eam	11.4.0
prettier-vscode	esb	6.3.2
vscode-pull-request-github-insiders	Git	2021.4.12319
vscode-kubernetes-tools	ms-	1.3.0
cpptools	ms-	1.3.0-insiders2
java	red	0.76.0
vscode-yaml	red	0.17.0
vscodeintellicode	Vis	1.2.12
vscode-java-debug	vsc	0.32.1
vscode-java-dependency	vsc	0.18.2
vscode-java-pack	vsc	0.13.0
vscode-java-test	vsc	0.28.1
vscode-maven	vsc	0.28.0

(1 theme extensions excluded)

A/B Experiments

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pythondataviewer:30285072
vscus158:30286553
vscgsv2ct:30286873

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Horizonal Scrolling through pointer on scroll bar (#109959)
• Clearing all cells while scrolled down messes with vertical scrolling (#115104)
• The scroll bar in the Find in Files pane is too small and scrolls the wrong way (#120277)
• Allow for horizontal scrolling a page at a time (#53492)

[meganrogge]

Please provide a screenshot or a gif illustrating the problem (attaching images won't work via email, you need to go to github.com). See this wiki page for more general info on how to report actionable terminal issues.
/label "needs more info" integrated-terminal

[sroyal-statsig]

Attached a gif showing the issue. At the end I'm trying to scroll down still but it won't scroll any farther to show the lines where I ran ls. Let me know if you need any more info

[Tyriar]

I've seen this as well. It's easy to workaround by just scrolling up and down but we should try fix this for April.

[Tyriar]

Can repro in xterm.js xtermjs/xterm.js#3311