The timeline thing keeps acting up for me. When I go to a thread with a new post it will flick around as if confused on where the latest post is and then settle on something further up the thread. The timeline on the top right will then disappear and I can scroll the thread to the end. I doesn’t matter if I have posted, or liked in the thread it will always go half way up.
Using Firefox Quantum, with uBlock Origin, Lastpass, CSS Scan and Augmented Steam as the only add-ons. uBlock is turned off on RPS.
Works fine in Chrome for me and it works fine on the Discourse site itself, I don’t know any other forums that use this to test on.