What might cause a partially loaded JPEG in a UIIm

Question

We are getting reports in the field, on both iOS and Android, of partially loaded profile images in our mobile app.

Here is what it looks like (note that I have gaussian blurred part of the image to protect the privacy of our members, but the grey is what is actually rendered):

AFAIK there is not a concept of loading "Progressive JPEGS" in UIImageView, so I am at a loss about how this image could even have been rendered at all. This code has not been modified in at least a year. All images are hosted on S3, and have been for 2 years.

Is it somehow possible that carriers are truncating images now if a device hits a certain bandwidth limit?

-- Edit --

I can confirm we were able to repro this behavior on an AT&T network. Is it possible that AT&T is munging images in this fashion when a user goes over his data cap or something?

Answer 1

I had this same issue crop up when I switched from https to http images. Needless to say... I switched back to https based images.