Can't dynamicly show or hide fields in a repeater

Select::make('course')
                        ->label('Cursus/opleiding')
                        ->reactive()
                        ->options(Course::all()->pluck('name', 'id')->toArray())
                        ->required()

            Repeater::make('schedule')
                        ->label('Planning')
                        ->reactive()                        
                        ->columns(2)
                        ->schema([
                            // other fields..
                            Select::make('course_id')
                                ->label('Cursus')
                                ->reactive()
                                ->options(Course::where('is_bundle', false)->pluck('name', 'id')->toArray())
                                ->visible(function($get){
                                    if($get('course')){
                                        return Course::find($get('course'))->is_bundle;                                        
                                    }

                                    return false;
                                })->required(),                        
                        ])