the heart freezing bug hasn't happened to me once. I don't know if thats a mobile problem or a your pc problem.
The PC version doesn't have this issue, but the mobile version does. If you test the Knife Carousel ( there are moving the knife up to the right and down to the left) while the heart is moving in a circle, and you try clicking once, releasing, and then clicking again to move, the movement buttons will become unresponsive.
Note: that this bug only affects Android.