This is mainly an annoyance in large files (which I deal with frequently).
After not using the app for a while, and returning to it, it forgets what line I was viewing (usually in the high 1000's), and instead it reverts to viewing line 1.
It basically happens on a daily basis, and so I'm left flicking my phone 20 times to scroll back to the bottom of my file. :(
Customer support service by UserEcho