My kids love it, but I started freezing.

My kids have always brushed their teeth, but when they noticed the app on their toothpaste they were so excited to use it. We have been using it ever since. It has been no trouble to get them to brush, especially twice a day because they get a full star that way.
Anyway, my app has started freezing when the second child gets ready to brush. Its frustrating for the child who doesnt get to use it. Any newer bug fixes?

Skdohm about Disney Magic Timer by Oral-B, v3.6