Same problem with full Mario Rabbis as donor: me too solve pressing home button and going back into the game in progress.Managed to get my first backup working (DK Tropical Freeze with the donor of Fortnite) Thanks Ty_!
Not sure if there is something I did incorrectly or does your game have the Nintendo switch loading black bars stuck on it too?
Someone knows a working donator for Outlast/Outlast2?