The tapatalk based app leaves a lot to be desired and there's not much we can do to trouble shoot it as it's provided by a 3rd party. The standard solution for app weirdness is to uninstall it, cycle your device off and on and then reload the app.
That said in the next few days we will be beta testing a new mobile browsing option that won't require a download and will be asking for feedback. The existing app will still be available but you might be willing to give this a try and offer your feedback.