In two different ways, the resolution of "chat" to the site specific chat is broken.
First, if you leave a comment with [chat] in it on a site, it will resolve to the name of the site but link to generic chat.stackexchange.
Notice that the name autoresolved in this case but the link did not.
Additionally, when selecting the "Chat" link from the dropdown, it defaults to the same generic chat.stackexchange:
When clicking this, I am not directed to the site chatrooms for UX, but rather Workplace:
Also note that if I manually navigate to "Favorites" then the next time I do this, I instead of seeing that I see the Favorites view:
Both these should resolve differently than they currently do.