Value in repeater is empty for each item

class TakeQuiz extends Component implements HasSchemas
{
    use InteractsWithSchemas;

    public array $data = [];
    public QuizAttempt $attempt;

    public function mount(QuizAttempt $attempt): void
    {
        $this->attempt = $attempt;

        $this->form->fill([]);
    }

    public function form(Schema $schema): Schema
    {
        /** @var Quiz $quiz */
        $quiz = $this->attempt->quiz;

        return $schema
            ->statePath('data')
            ->model($quiz)
            ->columns(1)
            ->components([
                Repeater::make('questions')
                    ->hiddenLabel()
                    ->relationship()
                    ->itemLabel(fn (array $state): ?string => $state['title'] ?? 'Nieuwe vraag')
                    ->schema([
                        Radio::make('answers')
                            ->hiddenLabel()
                            ->required()
                            ->options(fn (QuizQuestion $record) => $record->options->pluck('option_text', 'id')->toArray())
                            ->visible(fn (QuizQuestion $record) => $record->type === QuizQuestionType::SINGLE_CHOICE),
                        CheckboxList::make('answers')
                            ->hiddenLabel()
                            ->minItems(1)
                            ->options(fn (QuizQuestion $record) => $record->options->pluck('option_text', 'id')->toArray())
                            ->visible(fn (QuizQuestion $record) => $record->type === QuizQuestionType::MULTIPLE_CHOICE),
                    ])
                    ->orderColumn(false)
                    ->deletable(false)
                    ->addable(false)
            ]);
    }

    public function create(): void
    {
        $this->form->getState();

        $data = $this->data;

        dd($data);
    }
}