Tags.. Cache?

I have recently observed that when I create a thread and tag it, the thread does not appear on the tag page. Interestingly, I am able to see it as a guest when I log out. I have attempted to clear my browser cache and purged all caches I am using but the issue persists. Could there be something I am overlooking?

I have also disabled all add-ons and tried it on the default theme to troubleshoot the issue but to no avail.