iPhone 6s, iOS 13.4.1. iNat app 3.0.5 build 609
Step 1: Open the app
Step 2: Rotate the phone screen
Step 3: Rotate the phone screen back to where it was
Step 4: The screen will go black before the app is exited. Checking the open apps will show that iNat is still open:
Upon opening the app again, the homepage will be displayed.
For whatever reason, if you refresh your ‘my content’ notifications before trying this, the app won’t close when the screen is rotated in any part of the app.