I’m not sure if you guys already know this and working on it, but the forum seems to be buggy. In several situations, htmlcode is not not fully rendered. Topics are missing or sometimes the whole forum. It seems that your server close the connection during page loading. On chrome mobile and on desktop i got blank pages (white). This all happens randomly. There are hours, when the forum is working perfectly and sometimes not. Maybe this depends how much user are currently online.
Doing smilies like colon+uppercase letter D -> 
producing sometimes, “/>” next to it. Seems some kind of closing html tag issues?
The mobile version of the forum doesn’t have search, at least i didn’t found it.