Consider the following configuration for a dialog:

form:
  implementationClass: info.magnolia.ui.javascript.form.FormViewWithChangeListener
  properties:
    title:
      $type: textField
      i18n: true
      required: true
    keySellingPoints:
      required: true
      $type: jcrMultiField
      field:
        $type: compositeField
        properties:
          title:
            label: Title
            i18n: true
            $type: textField
          description:
            label: Description
            i18n: true
            rows: 3
            $type: textField
    image:
      $type: frontifyWidgetField
      height: 220

Reproduce
Try filling out the internationalized fields with content. Save the dialog. Reopen the dialog.

Expected
When reopening the dialog all internationalized fields should display their content.

Actual
Only some language data is displayed within the multivalue field. In the case of two languages (en and de) you only get one language. If you toggle the language selector in the detail subapp it can happen that both data go missing after a few tries of closing and reopening the dialog.

Notes

• When removing the frontifyWidgetField the dialog behaves as expected.
• Data is saved correctly to the JCR.