Some days, Ask Fedora does not recognize that I logged in the day before

To be clear, this does not happen every time I log in. But on two (non-consecutive) days, when I log in and look at the Latest posts, they go back farther than the last time I actually logged in and looked at the topics. Today, I even noticed topics that were “grayed out” because I looked at them, yesterday, but the ones before my “last visited” line were a full day farther back.

So, there seems to be a slight bug in the forum software.