It seems that the pages of xenforo.com do not support a portrait-landscape-portrait bascule. When you return to portrait mode, the display persists in landscape mode.
XenForo home page is a big mess on mobile. Is the team aware about this ? Not sure that a future customer can find his way between pages that are not responsive and the menu that does not work. What's happening on the corporate site?
It seems that the pages of xenforo.com do not support a portrait-landscape-portrait bascule. When you return to portrait mode, the display persists in landscape mode.
I get that issue with iOS 7.5.1. But OTOH looking at portrait - landscape - portrait isn't something I'd do. A Lot of sites have such issues - Adsense will cause this when an ad expands for landscape then stays at that dimension when going back to portrait.
There is one issue however which is the lack of padding on the boxes showing the addons, e.g. Resource Manager