bug: React, can't set value to array in JSX

### Prerequisites

- [X] I have read the [Contributing Guidelines](https://github.com/ionic-team/ionic-framework/blob/main/.github/CONTRIBUTING.md#creating-an-issue).
- [X] I agree to follow the [Code of Conduct](https://ionicframework.com/code-of-conduct).
- [X] I have searched for [existing issues](https://github.com/ionic-team/ionic-framework/issues) that already report this problem, without success.

### Ionic Framework Version

- [ ] v4.x
- [ ] v5.x
- [X] v6.x

### Current Behavior

IonAccordionGroup default value of array which has more than one item doesn't work


### Expected Behavior

IonAccordionGroup default value of array which has more than one item works normal

### Steps to Reproduce

the code is the screenshot above. Or maybe you can clone git@github.com:XueMeijing/ionic-test.git to recurrent it

### Code Reproduction URL

_No response_

### Ionic Info

Ionic:

Ionic CLI : 6.18.1 (/Users/xue/.nvm/versions/node/v10.24.1/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/react 6.0.1

Capacitor:

Capacitor CLI : not installed
@capacitor/android : not installed
@capacitor/core : 3.3.3
@capacitor/ios : 3.3.3

Utility:

cordova-res : not installed globally
native-run : 1.5.0

System:

NodeJS : v10.24.1 (/Users/xue/.nvm/versions/node/v10.24.1/bin/node)
npm : 6.14.12
OS : macOS Big Sur

### Additional Information

_No response_

Start by reproducing the IonAccordionGroup default-value issue using the screenshot or the ionic-test repository mentioned in the issue, then inspect the React IonAccordionGroup value handling. Done means an array containing more than one item works as the default value; verify the behavior with an appropriate regression test if the relevant test location can be identified.

Written by the indexing model from the issue text.