• VSCode Version: 1.17.0-insider
• OS Version: Windows 10

Steps to Reproduce:

1. Add these keybindings

[
	{"key":"f6","command":"workbench.action.tasks.runTask", "args":"run"},
	{"key":"ctrl+f6","command":"workbench.action.tasks.restartTask", "args":"run"}
]

2. Type f6
3. My run task begins
4. Type Ctrl + f6
5. The task selection screen pops up
   

Reproduces without extensions: Yes

It seems like he arg behavior in runTask code https://github.com/Microsoft/vscode/blob/c8eb003402ce5d6e0529a4da459b863ac5610af9/src/vs/workbench/parts/tasks/electron-browser/task.contribution.ts#L1975

Needs to be replicated in runRestartTaskCommand
https://github.com/Microsoft/vscode/blob/c8eb003402ce5d6e0529a4da459b863ac5610af9/src/vs/workbench/parts/tasks/electron-browser/task.contribution.ts#L2163

The same issue also exists with runTerminateCommand