Notifications don’t behave as they did before: If you track specific topics these are not shown as such (the bell icon) when entering that topic for the first time. Leaving and re-entering does show it as tracked.
The part that makes this somewhat annoying is that you cannot turn off the tracking when you first open that topic. This is (was?) part of my work flow: Click on New (if any are present) → Check topic → leave as tracked or set to normal. You now need extra steps to do this.
Checked this on the Discourse Meta site as well and it shows the same, in my opinion, unwanted behaviour.
Not sure if this is done on purpose or if this is a bug (way too many notifications related topics on the Discourse Meta site to get a definitive answer).
Also: No issues here with the PlayRaw layout using Firefox 91.5.0esr (Latest on Debian):
