This Was A Great App Till

My child has used this app for over 2 years to work on her math facts. It worked great till we started using on the new iPhone 6S. The numbers disappear from the bottom and the boxes that would contain 1-9 and 0 go blank as she progresses. Not sure why this is happening, but it would be great if the issue was corrected.

LaProfesora about Math Fact Master