different image than source with get_thumbnailer?

[jomopeh]

For each image I upload, I'm using get_thumbnailer on that source image and returning the url, which in my case will link to S3.

on model:

image = ImageField(upload_to='images')

then "image" is passed to get_thumbnail:

get_thumbnail(image, '200', crop='center', quality=99).url

{
image_url: instance.image.url,
thumbnail_url: get_thumbnail(instance.image, '200', crop='center', quality=99).url 
}

the image that "thumbnail_url" points to is not the same as "thumbnail_url"?????

My question is, without going through all the details, is there a possibility that sorl thumbnail via the get_thumbnailer method will render/use a different image than the source image, even though I reference that image field?
I understand sorl-thumbnail uses the key value architecture as a cache store, which I assume is unique and there will not be any name conflicts.

(I actually have a use case, where uploading images works consistently when uploading through either android or desktop browsers, but apparently if it's uploaded through iOS browser then issues such as I described above appears. I'm actually wondering whether this is a problem with django storages s3 instead, or some issue on the client).

Thanks for any feedback