Oh yeah I forgot to say that I recently posted on Discourse’s own forums since I personally spotted a few topics popping up in my notifications with an muted an tag due to an watched tag.
Anyway the response I got as you can see is that well…there’s a hidden preference option which is meant to allow you to see stuff that has muted and watched tags in it. Which seemingly isn’t enabled by default when shown (but actually was for me) so what was suggested is to enable, save and then disable said preference for it to actually take effect. (I think why is because this was added after these forums started and something went wrong with maybe starting it up so you have to kick the system awake maybe)