I'am using blueimp/jQuery-File-Upload to upload images on server. Sometimes image uploads freeze server and in developer tools appear message "Provisional headers are shown".
Here is one of such files (view). It name DSCN2594.JPG. But when I change name to CN2594.JPG (delete 2 first letters) or I suppose on any another name - upload works fine.
Why it may happen? I'am already break my brain!
Thanks in advance!