Downright amazing, but one problem

I wish I could give this game 5 stars. Really, I do. However, ever since upgrading to iOS 9.1, whenever I lock my device or start Multitasking, the game would restart! This gets really frustrating when Im playing the game during my schools passing periods, ESPECIALLY in Tidal Tempest. Whether this is an iOS 9.1 bug or a Sonic CD bug I do not know, but I am really hoping it gets fixed!

bubbyrules1 about Sonic CD Classic