Laravel Intervention/Image after save the filesize didn´t update - laravel

Question

I'm working in a simple image optimizer, but I have a problem, I open the image with make, get the filesize and give me the right value, then try to save with other name with different quality, I slowdown the quality one by one until the file size is less than 100. But the problem is that the filesize never change:
if ($data['picture'][$key]['weight'] >= 100) {
if (#copy(public_path() . '/photos/' . $images['path'], public_path() . '/photos/temp/'. $images['path'])) {
$img = Image::make(public_path() . '/photos/temp/'. $images['path']);
$height = $img->height();
$width = $img->width();
if ($height > 600) {
$img->resize(null, 600, function ($constraint) {
$constraint->aspectRatio();
$constraint->upsize();
});
}
$height = $img->height();
$width = $img->width();
if ($width > 800) {
$img->resize(800, null, function ($constraint) {
$constraint->aspectRatio();
$constraint->upsize();
});
}
$height = $img->height();
$width = $img->width();
$size = $img->filesize() / 1000;
$quality = 100;
At this point I get the correct file size, but now, if I destroy the image, and use make again the image is damaged, if I simply open with make again, the image is damaged too. And with this, give me the original size:
while ($size > 100) {
$img->save(public_path() . '/photos/temp/' . $images['path'])->encode('jpg', $quality)->filesize() / 1000;
dump($img->filesize());
if ($size <= 100) {
break;
} else {
$quality--;
}
if ($quality < 80) {
$size = 100;
break;
}
};
$data['photos'][$key]['temporal'] = '/photos/temp' . $images['path'];
}
}