Frustrating bug where if I switch out of the app, lock my phone, or open any other app, without fail after a few minutes the book will just stop playing until I open the app again, then it will pick up where it left off with out me even pressing play. I can't figure out why it's doing this and it's extremely annoying. I love the app otherwise, but this really needs to be fixed. It's frustrating enough I don't want to use the app until it's fixed.