Keybinding Ctrl+8 for workspaceViewer.focus

[jooyoungseo]

I've attempted to bind Ctrl+8 to workspaceViewer.focus command. However, the following only works when invoked from editor. When I press the assigned key in R terminal, it does not work. Does anyone have any solution?

keybindings.json:

[
    {
        "key": "ctrl+8",
        "command": "workspaceViewer.focus",
        "when": "editorLangId =~ /r|rmd/"
    }
]