Great game except for one problem

I love this game a lot its great fun! But my sister is having problems with hers she has a Samsung Galaxy s4 and every time she plays and earns the tears that are used to buy manes and other customizing items are missing. She is really upset about this it is ruining her game experience. I hope you guys could do something about this problem because shes not the only one

Personwhowantedtodosomething about Robot Unicorn Attack 2, v1.6.1