I’ve got a similar problem with ionic 1.2.4 and ios 9.3.1.
The app is starting, the splashscreen is displayed, then my home screen stays empty.
I’ve got no crash . Everything is ok on ios 9.3.
My app preformance is slowing down after I installed ios9.3.1 on my phone. Also I had to shut down my phone couple of times to get it workig again, after it disappeared when I was using it and then nothing respond. By the way I use ios@3.9.2, because 4.x.x does not with well with orientation so I avoid it.