The problem is in 430 line in TSMessageView.m
Gesture direction is never set for TSMessageNotificationPositionNavBarOverlay
You should set it like
[gestureRec setDirection:(self.messagePosition == (TSMessageNotificationPositionTop || TSMessageNotificationPositionNavBarOverlay) ?
UISwipeGestureRecognizerDirectionUp :
UISwipeGestureRecognizerDirectionDown)];
The problem is in 430 line in TSMessageView.m
Gesture direction is never set for TSMessageNotificationPositionNavBarOverlay
You should set it like
[gestureRec setDirection:(self.messagePosition == (TSMessageNotificationPositionTop || TSMessageNotificationPositionNavBarOverlay) ?
UISwipeGestureRecognizerDirectionUp :
UISwipeGestureRecognizerDirectionDown)];