Interesting. That particular bug never occured when I was playtesting. Anyways, the new update will be going up soon, hopefully with the error fixed.
I just checked the game again, and there doesn't seem to be any errors in the code. I believe the recognition stopping issue might occur if the performance of the phone where the software is installed is insufficient. Since this game is developed as a cross-platform game, it might put extra load on mobile environments. In future versions, I will work on improving the performance for mobile players.