mBraille from an iPad

Just wondering if anyone uses mBraille from their iPad or iPad Mini, and if so, what your results are. Using mBraille with my iPhone, I'm able to type quickly and accurately, to the point of it being my primary app for text entry on my phone. But I'm struggling a bit using it with the iPad. As I'm typing, every few letters, it seems to make what sounds like a double click, two letters entered at almost the exact same time... the one I meant to type and then some random symbol. It almost seems as if it's registering two separate keyboard presses at the same time. I've tried positioning my hands higher or lower on the iPad, thinking that would make a difference; but so far, no luck. It slows down typing significantly, because I'm always having to swipe back to delete the extra character I didn't mean to type.