I think there's definetly a problem with this theme. On latest Chrome version on Windows, my tab of FreshRSS uses less than 200Mo of memory. When I switch to this theme, it uses circa 1Go. That's probably why it sometimes don't show the banner.
It is even more visible on a mobile phone, everything is so slow.

EDIT: Got it, the theme is loading EVERY article. I have 14000+ unread, so yeah.

Originally posted by @Alwaysin in #4400 (comment)