File menu option vanishes after hover.

[sanket-bhalerao]

Issue Type: Bug

file menu item vanishes after hover
same is case for view, go, run, terminal options as well
edit, selection and help are working normally.
i have the file menu in the sidebar

the working screenshot for Edit menu item

VS Code version: Code - Insiders 1.48.0-insider (20cba51, 2020-08-07T05:35:24.758Z)
OS version: Windows_NT x64 10.0.18363

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-8265U CPU @ 1.60GHz (8 x 1800)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off protected_video_decode: enabled rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off_ok webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.87GB (7.55GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (21)

Extension	Author (truncated)	Version
ng-template	Ang	0.1000.7
vscode-eslint	dba	2.1.8
gitlens	eam	10.2.2
EditorConfig	Edi	0.15.1
vscode-npm-script	eg2	0.3.13
prettier-vscode	esb	5.1.3
output-colorizer	IBM	0.1.2
remote-containers	ms-	0.132.0
remote-ssh	ms-	0.51.0
remote-wsl	ms-	0.44.4
vscode-remote-extensionpack	ms-	0.20.0
typescript-javascript-grammar	ms-	0.0.53
vscode-typescript-tslint-plugin	ms-	1.2.3
cordova-tools	msj	1.9.5
debugger-for-chrome	msj	4.12.9
vscode-xml	red	0.13.0
vscode-yaml	red	0.9.1
sonarlint-vscode	Son	1.17.0
code-spell-checker	str	1.9.0
vscode-stylelint	sty	0.84.0
vscodeintellicode	Vis	1.2.9

[sanket-bhalerao]

@sbatten , is this fix going to be in the insiders build (August 10)?

[eamodio]

At first it seems to work, but hovering around on multiple menus (including deeply nested ones) and then coming back to say the File menu causes the following errors:

bootstrap-window.js:216 [uncaught exception]: NotFoundError: Failed to execute 'removeChild' on 'Node': The node to be removed is no longer a child of this node. Perhaps it was moved in a 'blur' event handler?
onUnexpectedError @ bootstrap-window.js:216
bootstrap-window.js:219 Error: Failed to execute 'removeChild' on 'Node': The node to be removed is no longer a child of this node. Perhaps it was moved in a 'blur' event handler?
    at Object.removeNode (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/dom.js:17)
    at Menu.dispose (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/actionbar/actionbar.js:352)
    at SubmenuMenuActionViewItem.cleanupExistingSubmenu (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/menu/menu.js:592)
    at RunOnceScheduler.runner (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/menu/menu.js:523)
    at RunOnceScheduler.doRun (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/common/async.js:525)
    at RunOnceScheduler.onTimeout (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/common/async.js:520)
onUnexpectedError @ bootstrap-window.js:219
/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/dom.js:17 Uncaught DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is no longer a child of this node. Perhaps it was moved in a 'blur' event handler?
    at Object.removeNode (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/dom.js:17:29)
    at Menu.dispose (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/actionbar/actionbar.js:352:17)
    at SubmenuMenuActionViewItem.cleanupExistingSubmenu (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/menu/menu.js:592:41)
    at RunOnceScheduler.runner (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/menu/menu.js:523:26)
    at RunOnceScheduler.doRun (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/common/async.js:525:22)
    at RunOnceScheduler.onTimeout (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/common/async.js:520:22)
bootstrap-window.js:216 [uncaught exception]: NotFoundError: Failed to execute 'removeChild' on 'Node': The node to be removed is no longer a child of this node. Perhaps it was moved in a 'blur' event handler?
onUnexpectedError @ bootstrap-window.js:216
bootstrap-window.js:219 Error: Failed to execute 'removeChild' on 'Node': The node to be removed is no longer a child of this node. Perhaps it was moved in a 'blur' event handler?
    at Object.removeNode (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/dom.js:17)
    at Menu.dispose (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/actionbar/actionbar.js:352)
    at SubmenuMenuActionViewItem.cleanupExistingSubmenu (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/menu/menu.js:592)
    at RunOnceScheduler.runner (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/menu/menu.js:523)
    at RunOnceScheduler.doRun (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/common/async.js:525)
    at RunOnceScheduler.onTimeout (/C:/Users/Eric/code/microsoft/vscode/out/vs/base/common/async.js:520)
onUnexpectedError @ bootstrap-window.js:219
/C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/dom.js:17 Uncaught DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is no longer a child of this node. Perhaps it was moved in a 'blur' event handler?
    at Object.removeNode (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/dom.js:17:29)
    at Menu.dispose (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/actionbar/actionbar.js:352:17)
    at SubmenuMenuActionViewItem.cleanupExistingSubmenu (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/menu/menu.js:592:41)
    at RunOnceScheduler.runner (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/browser/ui/menu/menu.js:523:26)
    at RunOnceScheduler.doRun (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/common/async.js:525:22)
    at RunOnceScheduler.onTimeout (file:///C:/Users/Eric/code/microsoft/vscode/out/vs/base/common/async.js:520:22)