Filament Reactive not Working

  public static function form(Form $form): Form
    {
        return $form
            ->columns(3)
            ->schema([
Forms\Components\Select::make('exercise_type_id')->label("Question Type")
->relationship('exerciseType', 'name')
                    ->reactive()
                    ->default(1)
                    ->required(),
Forms\Components\RichEditor::make("question")->columnSpan(3)->required(),  
Forms\Components\RichEditor::make("explanation")->columnSpan(3),                
            Repeater::make('answerlist')
            ->defaultItems(4)
            ->relationship('multipleChoiceAnswers')
            ->label("Multiple Choice Answer Option")
                ->grid(2)
            ->schema([
Forms\Components\TextInput::make('text')->label("Text Answer"),
Forms\Components\FileUpload::make('img')->label("Image Answer")
                ->directory('module-images')
                ->storeFileNamesIn("original_filename"),
Forms\Components\Checkbox::make('is_correct_option')->label("Mark Answer As Correct")->default(false),            
            ])->columnSpan(3)->required(fn(Callable $get) => ($get('exercise_type_id') == 1))->hidden(fn(Callable $get) => ($get('exercise_type_id') !== 1))->reactive(),
            ]);
    }