In all seriousness, Tapatalk and the iPhone, (even though it was developed for iPhone first), has always given us issues.
There's honestly, very little that I can do to help...its a 'canned' package add-on for the SMF forum software...there is zero configuration, etc...I installed it, and it started working.
The best thing would be to report/open up a case/bug report to Tapatalk...or hop on their forums and see if others are having the same issue.
Sorry.