Great app, but ... 3.5 stars because of one issue – Sudoku Magic - The Ultimate Sudoku App Review

I'm addicted to this app and it's well designed except one one flaw: Often, but not always, the numbers that I have already solved disappear when I resume the game. The time is ticking away at whatever time it was when I paused it but the puzzle is totally blank again and I have to start over. It happens often enough that I'm considering deleting it in frustration, although I have enjoyed the game for so many puzzles that I've definitely gotten my money's worth. Fix this, and it's worth 5 stars for sudoku fans. Thank you.
Review by Oklahoma Music Fan on Sudoku Magic - The Ultimate Sudoku App.