EXPERIMENTAL_Select does not work outside the Admin's Iframe

[laerc]

Describe the bug

When we use the <EXPERIMENTAL_Select/> component inside the <Modal/>, which is outside the iframe as stated in this example:

<Modal 
   {...}
   container={window.top.document.getElementsByClassName('render-provider')[0]}
>
   {...}
   <EXPERIMENTAL_Select {...} /> 
</Modal>

The styles of the Multiselect component crash and the component does not work properly.

To Reproduce

Steps to reproduce the behavior:

1. Go to this linked workspace
2. Click on the button to edit the section General Information
3. A Modal will open
4. Find the field Trade Policies *
5. Note that the styles are broken
6. Try to interact with the component and you should see an error.

Expected behavior

To work correctly as intended.

Screenshots

Usage with the <Modal> component inside the Admin's iframe:

Usage with the <Modal> component outside the Admin's iframe:

Additional context

I looked at the documentation of the component that we are using to implement the EXPERIMENTAL_Select and the library does not have a prop container(docs). This might be the reason why this is not working.