I have the same issue. As I'm scrolling down the list of videos on the tablet by swiping with my finger, it refreshes ("Scanning files") the display approximately every 15-20 sec and resets the display to the beginning of the list.
If I grab and scroll down using the scroll bar on the right, it doesn't exhibit this behavior.
The behavior I expect is scan and refresh when initially started and then refresh/scan only when I manually swipe down from the top of the display. (I'm using an Android Nexus 7 tablet and Windows 7.)