[Bug] Audio Tracks Disappear After Undo, Again

Hello peeps, first time on here but Im having similar problems as above. Recording a piece earlier (4 tracks, various inputs sunrizer, novation, through Audiobus), went to undo a small deletion one of the tracks and up pops a box stating “could not find trackname backup file”. The file which I now have contains only one track so I have lost all the other recordings of the tracks.

This happened last week also. Tried to open a recording which was saved, Cubasis seemed to take ages to open it, then nothing happened. The file became some kind of phantom file dated 1986!!!

What is going on here? Im on iPad 3, running iOS and the very latest Cubasis (including recent update)

THis is making me seriously rethink Cubasis as a reliable tool.