Not sure if this is a help request or a bug report 
On both my Discourse forums (https://zbeul.org, https://forum.linuxquimper.org) RSS feeds seem to be unavalaible at first, despite being properly declared in page source: in Firefox, the RSS button is greyed out.
Once I visit them “manually” and re-visit the forum, Firefox displays a clickable button.
But I can’t repro this on Meta!
Anyone experiences this?