Long link in md file

In .md file I have added this link:

http://www.agenziaentrate.gov.it/wps/file/Nsilib/Nsi/Home/CosaDeviFare/ComunicareDati/Assicurazioni+gestori+utenze/Comunicazioni+gestori+Servizi+PU/Normativa+e+prassi+GestoriUtenze/Circolare+n+44+E+del+19+10+2005/circolare_44_2005.pdf

and Grav has crashed!

"Grav crashed" does not give much information on what the error might be. Did you get an error message? Did you add the link in the admin crashed? Or the frontend crashed?

I just tried, I was able to add the link and it works.

What PHP version are you running @samuele ?

PHP Version 5.5.23 (Apache 2.0 Handler on Windows)
The system goes in timeout, I don't have any errors...

In production server (PHP Version 5.4.45 Linux CGI/FastCGI) I don't have this problem.

Probably just a limitation on Windows, i'm not sure what Grav could do to alleviate. Probably best to use a shorter URL if possible.