Ipad Flashcards freeze. Not going too fast.. Has happened more than a few times. Usually about 70% through lesson. Refresh simply starts lesson from beginning! Frustrating. Any way to advance quickly to 70-80% of lesson? Example:I am at 71% through French level 4 session 22 and it freezes. Have completed entire 5 levels and it has happened at least 20 times. Any ideas?