After image resize new images are partially greyed out

im using Yii2 Image to resize my images, im using the following code:

Image::thumbnail($file, 200, 200)->save($newFile, ['quality' => 85]);

We are using Imagick.

But for some reason, 2~5 images of a set of 100 images that are being resized have partially greyed foreground color.

I noticed some one else had the same problem:

We checked the temp folder for overflowing, this was not the case. Even if it happend, we resized the image manualy after, which ends up fine.

Any idea what else i could try?