I have noticed that within the last month (or two), that Discourse forums I read no longer “scroll smoothly” through topics. That is, as I scroll through a long topic, my browser screen jumps up to show a post about two or three prior. I can usually fiddle around to scroll to later posts, but I haven’t figured a consistent workaround.
I am moderator on the OpenWrt forum forum.openwrt.org which is using Discourse 3.4.0.beta3-dev