Non string literal Element id result in corrupt json

[eschiebel]

Describe the bug
The documentation states that an id prop is required on Element if used within a user component. This seems to work find if the id is set to a fixed string literal like id="bottom" but the json gets corrupted if set via a variable.

To Reproduce
In the basic example

1. Edit examples/basic/components/user/Card.js
2. in the definition of Card, add const [bottomid] = useState(window.crypto.randomUUID()); then change the Element id for CardBottom from id="bottom" to id={bottomid}
3. on the demo page drag a new Card onto the page, then drag a new Button into the CardBottom.
4. Click "copy current state", then "load" and paste.
5. See that the button you dragged into the Card is not present.

Expected behavior
I should either be able to programmatically set an Element id, or the documentation should state this needs to be a string literal

Screenshots
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Additional context
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Your environment

Software	Version(s)
craft.js	0.2.0 and 0.2.6
React	16.14.0
TypeScript
Browser
npm/Yarn
Operating System

[dbjpanda]

Honestly, their basic example code needs a severe fix. Nothing works for me. Outdated Material ui etc in the example + this missing Element id error.

[eschiebel]

Sure, but I just leveraged the basic example as the shortest path to recreating the bug.