karabiner element complex modification to ensure command + space combination could be received by the system

command_space_commitment.json

{
  "description": "command + space commitment",
  "manipulators": [
    {
      "type": "basic",
      "from": {
        "key_code": "space",
        "modifiers": {
          "mandatory": [
            "left_command"
          ],
          "optional": [
            "any"
          ]
        }
      },
      "to_if_alone": [
        {
          "hold_down_milliseconds": 100,
          "key_code": "space",
          "modifiers": [
            "left_command"
          ]
        }
      ]
    }
  ]
}