HTTP 416 Content-Range:bytes */0 issue?

[kioto mitsubisi]

Hi,

>From time to time, Varnish 4 respondes the the client with HTTP 416 even though backend successfully returns HTTP 200.
The problem occurs when a pdf document is opened in Chromium and it send the "Content-Range:bytes */0" header.
Anyone experienced the issue before? Do we need to something about Accept-Range etc in my VCL? Currently we have a very simple VCL that removes cookies, lowers the URL and removes query string.

Thanks in advance.