Help with Downloading - Reverse Proxy - Cloudflare

[sohail579]

I have a domain and use a reverse proxy (NGINX Proxy Manager) , I have my cloudflare set to DNS only. in my reverse proxy I have set the advanced parameters as:

proxy_max_temp_file_size 0;
proxy_buffering off;
client_max_body_size 0;

The issue i am having is that i can not download files which I think i have narrowed down to anything above 100mb. I assumed that setting cloudflare to DNS Only would mean that file limits are unlimited.

This happens in the app and on the web

downloading from the internal IP is fine no issues

can anyone help me?