`<C-Left>` and `<C-Right>` remapping in insert mode not working

Unable to use ctrl+arrowLeft and ctrl+arrowRight to remap some actions in insert mode.

I have this settings.json:

{
    "omnisharp.path": "latest",
    "omnisharp.useGlobalMono": "always",
    "vim.useCtrlKeys": true,
    "vim.handleKeys": {
        "<C-Right>": true,
        "<C-Left>": true
    },
    "vim.normalModeKeyBindings": [
        {
            "before": ["<C-Up>"],
            "after": ["5","k"]
        },
        {
            "before": ["<C-Down>"],
            "after": ["5","j"]
        }
    ],
    "vim.insertModeKeyBindings": [
        {
            "before": ["<C-Left>"],
            "after": ["<ESC>","d","b","<Del>","i"]
        },
        {
            "before": ["<C-Right>"],
            "after": ["<ESC>","l","d","e","i"]
        }
    ]
}

I would like to delete words using ctrl+arrowLeft and ctrl+arrowRight.
Works well ["<C-Up>"] and ["<C-Down>"] keybindings in normal mode to move up and down by 5 rows, but the default behaviour is applied for ["<C-Left>"] and ["<C-Right>"] (move cursor to the beginning/end of the adjacent word).

I'm not able to attach log output, because setting the logging level as suggested in the documentation, not print me any error or warning messages.

• Extension (VsCodeVim) version: 1.19.1
• VsCode version: 1.54.3
• OS: Ubuntu 18.04.5, Linux x64 5.4.0-67-generic

Start by reproducing the behavior with the reported settings.json, focusing on vim.handleKeys and vim.insertModeKeyBindings for and . Compare the working normal-mode bindings with insert-mode handling in the VSCodeVim extension. Done means both insert-mode keybindings invoke their configured actions instead of the default cursor movement.