Updated RSS feeds aren't highlighting the tab in Fraidycat desktop or web :/

[LemonadeGoneLime]

• [ x] I have checked the Common Problems page.
• [ x] I have searched the issue tracker for a bug that matches the one I want to file, without success.

Describe the bug
I've noticed an issue with Fraidycat Web on Firefox and the desktop version for Windows. The tabs or feeds aren't highlighting to indicate updates. I've experimented with various settings using my test RSS feed, and although the feed itself is updating, the tab isn't highlighted. This issue occurs both on the main "home" page and in separate "real-time" tabs. It would be really helpful if this could be fixed, as the highlighting feature is great for quickly checking for updates without having to manually sift through each post and remember when I last checked. Appreciate your help, thanks!