Unsupprted file fixed by ejecting? WDTV live plus

don’t know what I am doing wrong but every once in a while a (various) movie file says unsupported file. But I can fix this by ejecting and reconnecting. Doesnt matter if it is a usb drive or my powered external drive. After watching a movie I stop then exit back to home screen before I turn it off.

happens in current firmware and previous