Learn to Code deleting itself

Hi


The activities within the Swift Playgrounds app on the iPad are deleting themselves.


I had Playgrounds opened this morning to do some work preparing for the next school year. All the activities had removed themselves to the cloud. I reinstalled Learn to Code 1 and 2 as well as Blink and used them all fine. This evening I open Playgrounds to find them all gone again and the cloud symbol on the icons.


Last year I had the same problem with my students. One week we would be working on Learn to Code 1 and when they turned up at the start of the next lesson about 75% of them had lost it. This writes off the whole lesson as the file is so big that the school wifi cannot handle it and they all sit there with no movement on the download dial.


Has anybody else had this issue? Does anybody know the cause or solution?


I'm currently running iOS 11.4 (15F79)

On a 2016 9.7" iPadPro model A1673