Reply To: new topics or answers is vanishing
Okay definitely not just CSS.
So any new simple text post will not submit in the frontend of your site in a topic?? If a participant say had the the link limit you set in Settings > Disscussion their post would have the status pending which won’t show up regularly in the topic list of a forum.
It could be a possible tricky caching issue.
If you do not mind, you can contact me through email, and give me login details of a participant user so I could test out what is the issue.