Function getUrl returns wrong file extension

[projct1]

Here is my model:

class Place extends Model implements HasMedia
{
    use InteractsWithMedia;

    public function registerMediaCollections(): void
    {
        $this->addMediaCollection('dish_files')
            ->registerMediaConversions(function (Media $media) {
                $this->addMediaConversion('default')
                    ->width(1920)
                    ->format('webp')
                    ->fit(Fit::Contain);
            });
    }
}

Here is adding media (i am using Nuxt File Storage):

class PlaceController extends Controller
{
    public function update(Place $place, PlaceRequest $request): Place
    {
        foreach ($request->input('dish_files_to_add', []) as $file) {
            $place->addMediaFromBase64($file['content'])
                ->setFileName($file['name'])
                ->setName(pathinfo($file['name'], PATHINFO_FILENAME))
                ->toMediaCollection('dish_files');
        }

        return $place;
    }
}

But after uploading Dinner.pdf, i am getting this url:

// http://localhost:85/storage/4/conversions/Dinner-default.webp
$place->getMedia('dish_files')->getUrl('default');

Why webp?
Everything in the database indicates that this is a pdf:

My food menu files can be either images or pdf files.
Tell me, is this a bug or a feature? What can I do in my situation?

[projct1]

Or i have to make crutch, something like this?

public function registerMediaCollections(): void
{
    foreach (MediaCollectionEnum::cases() as $collection) {
        $this->addMediaCollection($collection->name)
            ->registerMediaConversions(function (Media $media) {
                $conversion = $this->addMediaConversion('default');

                if ($media->type === 'image') {
                    $conversion->width(1920)
                        ->format('webp')
                        ->fit(Fit::Contain);
                }
            });
    }
}

But then I get jpg url...: http://localhost:85/storage/2/conversions/Dinner-default.jpg

[projct1]

Or i should use this?

$media->getUrl(
    $media->hasGeneratedConversion('default') ? 'default' : ''
);

Or this?

$media->getAvailableUrl(['default'])