My app works perfectly the first time it is used but when returning to the start after playing the game and playing another it does some random things. I figure it is because the app still retains the previous game in it’s memory allocation? My question is, what is the best way programmatically to have an app start fresh and not have to quit it and open it again?

I have been using Swift Playground to build and submit my apps to the appstore for around three years now. Recently I uploaded two of my apps but now when I submit them for approval an error is issued… “Unable to Add for Review”… (see pic attached). I don’t understand it because Playground does not use Xcode as far as I am aware? Can someone advise me what I can do to resolve this? Is it something I have to wait to be fixed by an Apple update?