Threads and posts aren’t properly marked as read when I visit them. I do have this problem only on this discourse instance, not on the other 3 I am visiting regularly.
I’ve already cross checked configuration but can’t find anything in this regard.
Also I’ve observed, that sometimes the blue markers beneath a post slowly vanish and when I go back then, a post is read properly. But most of the times the dots just stay, and when they stay, the discourse scrollbar doesn’t move at well. It then sticks to the first unread post, regardless of scrolling. Since nothing is marked as read, I will enter the thread at the same post each time after leaving until it I manage to hit it in a working moment (which happens in less than 10%).