Relations in values and initialValues from useContentManagerContext are empty in edition mode
## Bug report

### Required System information

- Node.js version: 20
- NPM version: 9
- Strapi version: 5.6.0
- Database: PostgreSQL
- Operating system: Docker `node:20-alpine`
- Javascript

### Describe the bug

On frontend components in editView, if we use `useContentManagerContext` to get values or initialValues it works on creation mode when we create relation, but it not been loaded properly in edition mode, `connect` array is empty.

### Steps to reproduce the behavior

1. Create a custom component and add it in editVIew `right-links` placeholder.
2. Log values and initialValues from `useContentManagerContext` in that component
3. On a collection item with a relation, ie: Article as one User
4. Open existing Article card with a User relation
5. On loading data is empty in `values.user.connect`
6. If you remove relation and select it again, now value is in `values.user.connect`

### Expected behavior

Relation should be populate on data loading as it worked in Strapi 4

### Code snippets

Component to test behavior:

```javascript
const TestComponent = () => {
  const {
    form: { initialValues, values },
  } = useContentManagerContext();
  
 return <ul>
   <li>initial values: {JSON.stringify(initialValues?.user?.connect)}</li>
   <li>values: {JSON.stringify(values?.user?.connect)}</li>
 </ul>
}
```

Added in `admin/app.js` :

```javascript
export default {
  bootstrap(app) {
    app
      .getPlugin('content-manager')
      .injectComponent('editView', 'right-links', {
        name: 'TestComponent',
        Component: TestComponent,
      });
  },
};
```
