Annoying tech/programmer/human computer interaction designer thoughts on things in spoiler:
The hover is not likely to be accurate, as that is probably very cached, and there are a lot of cache updating issues with this forum software, it should not need users to hard reset and wipe the site data to work, or log out and log in etc, but it does, I love the forum it is neat and the tag idea is neat, but it does have some flaws in the software that do not follow good human computer interaction techniques and guidelines, in particular for non techies having to learn how to fix the site themselves, that is not good design. Would be much better if the site included a cleanup thing that it ran on page navigation perhaps once per day or something, like when going to the main page of the forum, check some variable that is stored “last cleaned at <timestamp>, is that 24 hours or more? ok wipe all cookies and stored site data and reload fresh ones from server” but yeah that is a programming solution to the problem and not software owned by the site runners.