Channel related emotes tend to break randomly. One stream they will work, another they won't. The global emotes still show up and I can use autocomplete, but the channel ones don't. I've chatted with others on the affected channels and some had the same issue whenever I did, but most saw the emotes without a problem.
I refreshed, hard refreshed, disabled cache with dev tools, cleared browser cache, cleared cookies - it still doesn't work.
I had this issue multiple times on channels like: ZubatLEL, realgigasteve, Ruji. Usually not at the same time - on one of the channels the emotes will work, but on the other they won't.
I'm on Chrome, MacOS (both newest versions), but I know other people who had this issue on the same channels use other browsers and OS.