Laravel Forge download limit

When trying to download file larger than 1024MB from server using PHP "return response()->download(...);" it doesn't download more than 1024MB.

When downloading from public_html not via PHP, larger files can be downloaded.

Nginix error:

2016/09/15 13:23:58 [error] 5801#5801: *198201 readv() failed (104: Connection reset by peer) while reading upstream, client: xx.xx.xx.xx, server: xxxxxx.com, request: "GET /test HTTP/2.0", upstream: "fastcgi://unix:/var/run/php/php7.0-fpm.sock:", host: "xxxxxx.com" Using: Laravel Forge, Laravel 5.1, Nginx, PHP 7.