Hi. Is this some kind of bug? I have all new iPad Pro and work on it on-the-go using Lightroom (paid subscribtion). From time to time app exits to home screen. No error, no message, all changes are saved, it still sits in background but while I open it again it needs some time to reload. It's not a big deal but it's annoying, sometimes happenes couple times per hour and sometimes occurs once a day or even not. Seems more like a compatibility problem rather than problem with the hardware itself.
That shouldn't be happening as Lightroom app on your iPad exists to the home screen unexpectedly, sorry to hear about this. Let us help make it right.
Which version of Lightroom app are you using on your iPad? Does the app closes and shows the iPhone's home screen(in that case, it's crashing) or does it stay open showing you all the images in Grid view?