keybind: `until` don't work with `ExecuteHostCommand`

$env.config.keybindings ++= [{
    modifier: control
    keycode: char_e
    mode: emacs
    name: eol_or_fzf
    event: {
      until: [
        { send: ExecuteHostCommand, cmd: "^false" }
        { send: HistoryHintComplete }
        { edit: MoveToLineEnd, select: false }
      ]
    }
}]

https://github.com/nushell/reedline/blob/22768f3e01523e3a2ea7d521f298909155a22496/src/engine.rs#L1173-L1176
https://github.com/nushell/reedline/blob/22768f3e01523e3a2ea7d521f298909155a22496/src/engine.rs#L810-L818

reedline seems never execute the command and check exit code. it just emit the command to nushell?
so the false command prevent the until loop iteration.

Start with the linked src/engine.rs sections around lines 1173-1176 and 810-818, then reproduce the keybinding example in Nushell. Trace how ExecuteHostCommand is emitted and whether its exit status reaches the until loop. Done means the command is executed and a failing false command prevents the next until iteration.