RSS Feed only showing the header

I have recently add the Formlabs rss feed to my news accounts in Thunderbird…
I get to see when a comment is made within in relevant discussion/topic because I get a msg.
That msg includes the subject line and the top community forum header, but no content.
When I look at the msg source I see the msg including
" "
All my other rss feeds work fine.
Is this a problem with my user account settings ? or should I look closer to home?
Thanks