I have an ipad Air 13" with Ios 18.5. 
As you can see from the screenshot, Stagetraxx has resized [not minimized?] to a small window. It does this intermittently without me touching the screen. The ipad is in a clamp on my microphone stand untouched. Apple support suggest that I uninstall and reinstall Stagetraxx but as a retired IT Manager, I don't have much confidence that this will work.
Could it have something to do with the size of my song library? I use .WAV files and I have about 350 songs which makes the full backup around 13.5Gbs. Should I be using .MP3's which are a fraction of the size?
I hope you can cast some light on this probelm as I don't want Stagetraxx to minimize like this during a gig
Thanks Peter
Derek