RSS feed for newpkg is behind challenge

Good afternoon,

I'm using the feed from 
https://packages.debian.org/sid/newpkg?format=rss for 8 years, using 
TinyTinyRSS.

It seems that since some weeks (months?), the software is facing the 
"challenge page", probably due to aggressive scraping from some actors. 
The webpage contains the HTML tag "<title>Client Challenge</title>", and 
a JS to load.

Unfortunately, I was unable to reproduce the content fetch from 
TinyTinyRSS. Using cURL, even with the same User-Agent, leads to the 
"real" content. And so, I don't know how to fetch the real content from 
my TinyTinyRSS instance.

Does someone has an idea?

Have a nice day,

Adrien