[BUG REPORT] lock screen will make interface disappear after second video

By interface I mean the lock screen icon and any custom info that has been set. For example I have time remaining, time etc in the top corners. The only workaround is to switch on-off the screen with a hardware button, and the device will leave lock mode.

Using the last pro version in a Samsung galaxy 10.1 2014 but this issue is already several month in.