OnTabChange Event not fired on TinyMCE Custom Dialog with TabPanel

With TinyMCE V6, in a custom dialogs, i’d like to handle the tab change event of a tabpanel which got two tabs. I tried to use ‘OnTabChange’, ‘OnChange’ but none of them was never fired. How can i achieve this?

Here’s the code i used:

let activeTab = 'Insert_UGC_From_ID';
const InsertUgcPanel = {
    title: 'Insertion'
    body: {
        type: 'tabpanel',
        tabs: [...]
            }
        ]
    },
    buttons: [{
            type: 'custom',
            name: 'insert-UGC-button',
            text: 'Insérer la chaîne'
        },
        {
            type: 'custom',
            name: 'doesnothing',
            text: 'Annuler'
        }
    ],
    onTabChange: (dialogApi, details) => {
        if (details.name) {
            activeTab = details.name;}
    },  
    onAction: (dialogApi, details) => {
        if (details.name === 'insert-UGC-button') {
            const data = dialogApi.getData()
            dialogApi.close()
        } else if (details.name === 'doesnothing') {
            dialogApi.close()
        }
    }

};