Q: Photo app crashing and going back to home screen when trying to take photos

HI there juniper76m

It sounds like your Photos app us not staying open and keeps losing photos you take when it closes. I would quit the Photos app first:

Force an app to close in iOS
 

1. Press the Home button two times quickly. You'll see small previews of your recently used apps.
2. Swipe left to find the app you want to close.
3. Swipe up on the app's preview to close it.

 
When you have done that restart the device and test the issue again:

iOS: Turning off and on (restarting) and resetting
 
If the issue persists, backup your device to iTunes, then restore it as new and verify that it works. 
 
How to erase your iOS device and then set it up as a new device or restore it from backups
 

If it does, then restore your backup to either verify it still works and the software just needed reinstalled, or isolate the issue to the backup file itself. 

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