I have a couple of iPad Mini 2 units running Indigo Touch 2.1.2.
They had been running fine for the last year, but now with iOS 12, here is what happens:
-We usually press the home button to wake up the iPad and then let it turn off after 15 minutes
-There is only one custom control page that we use, which has 6 refreshing jpg images from security cameras
-Now when we don’t use the iPad for say more than 8-16 hours, when we wake it, Indigo and it’s custom control page is gone, and we are just at the home screen
-I’m waiting for it to happen again to check if Indigo is backgrounded or actually closed, but pretty sure it’s the latter
-This behavior has happened for a few days now and on both iPads, as soon as it was on iOS 12