SlateJS: slate-core Editor not updating value for simulated onKeyDown events

I'm attempting to simulate onKeyDown events on the Editor from slate-core -- as opposed to slate-react -- to test some plugins I am developing. However, the Editor is not updating its Value whatsoever.

I've extensively looked through the SlateJS 0.47.x documentation and from what I can tell the Editor component should respond to onKeyDown events out-of-the-box.

Here is a small codesandbox example that reproduces my problem.

^ Notice that despite me trying to simulate numerous onKeyDown events -- in the file core-editor-is-not-responding-to-on-key-down-events.js -- the value of the Editor never updates; it remains a blank document.

I am concerned about this difference in the behavior because seems like I would need to re-write functionality of inserting text as it gets typed out when said functionality I believe already exists.

Any help would be incredibly appreciated!

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