It fixes #681

The bug was introduced in #619.

It's not a first time since we encounter this issue, see #307 and especially #312 (comment).

I faced it in storybook and managed to reproduce it using this story:

import { Meta, Story } from "@storybook/react";
import { Buttons, ButtonsProps } from "./Buttons";

export default {
  title: "Components/Buttons",
  component: Buttons,
} as Meta<ButtonsProps>;

export const Default: Story<ButtonsProps> = ({}: ButtonsProps) => (
  <div
    buttons={[
      {
        foo: "bar",
        jsx: <div key="1">Button in array</div>, // this leads to OOM
      },
    ]}
  />
);

but couldn't write test case for it. I tried to reproduce it using code snippet from #312 (comment) with latest react and react-element-to-jsx-string but couldn't for some reasons.

So this is why I decided to add test directly to src/formatter/sortObject.spec.js

It also should fix storybookjs/storybook#16827.

I suggest to backport it to v15 because people mostly use react 18 right now: