iPhone's automatically updated to the 10.4.1 for the LF App and we get the following 2 problems on many iPhones out in the field. I could instantly reproduce on my personal iPhone.
Tried reinstalling, restarting the OS, no luck. We can't seem to roll back to 10.3
Everytime you lose focus on the app and return to focusing on the app (primary window or apple's version of alt-tab) the app refreshes and starts at the beginning, losing anything you might have been working on.
The app closes at random intervals in around 10-20 seconds of use. It tries to show a window about a bug report but even that closes before you can read it.