I've noticed a couple of issues with Tapatalk and RAWK lately (mostly with subforums disappearing), I notified Tapatalk of these and they claimed that the version of the Tapatalk plugin which RAWK is using is out of date.
No idea whether this is true or the issue is on their end (given the amount of updates they release, that's more than possible), just thought I'd post this in case there is an update that can be applied on RAWK's side.