media file contains errors

I’m having a recurring problem with .jpg images that I’ve uploaded to my media library. For no apparent reason, an image will disappear from a page or post – even when I haven’t made any changes recently. When I look at the media library, I will see the title of the image instead of a thumbnail. If I click on the title to view the image, I get a message that says “The image {filename} cannot be displayed because it contains errors.” Usually I am able to fix this by re-uploading the image and then updating the links. However, I’m now having a problem with a particular image which I’ve uploaded multiple times (from two different source files) and it keeps breaking. Does anyone have any ideas about what could be causing it and how I go about figuring that out?

Thanks!
[=sfc=]