Threads always marked as read

[j.crater]

Hello all, I am really happy to see this forum come alive!

I noticed an issue after I visit a subforum. When returning back to main forum page, all threads of the subforum are marked read, even if I didn't open single one of them. This wasn't the case on the "old" forum, so maybe there's a fix for it, or I have to do something with my settings?

Best,
JC