Could you link to the site you are experiencing this issue, it could just be some CSS hiding the replies? 
		
	 
	
	
	
 
		
			
		
			
	
	
		
		I have a private forum, and it claims it’s empty, so I suspect the reply or topic to really not beeing there
		
	 
	
	
	
 
		
			
	
	
		
		 @bwarntzen
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.
https://robkkdev.wordpress.com/contact/
		
	 
	
	
	
 
		
			
	
	
		
		Found the cause. I’m posting to o-norge.no/ and the i get redirected to the site url o-norge.no/wordpress/forum, and then the POSt is gone
		
	 
	
	
	
 
		
			
	
	
		
		I did som changes to my nginx config to accept both url’s, and now it works fine.