On iPad Air iOS 10.2.1
About 10% of the time, KRFT hangs when exiting, loading surfaces. It will start the process and the irridescent K comes up and never goes away. I khave to kill/restart the app. Dialog box says the app did not shut down correctly and asks if I want to reload the surface I was working on. When I load, all my edits have been saved.
Not sure yet what's triggering this. Seems to be after heavy editing and playing, though it's happened when exiting demo surfaces too.