Hi,
I found on your device, that some standard programs have defects:
1. "Videoplayer" - While playing a video-file that happens to pause playback, depending on a setting of "Display\Backlight Time". For example, if the display backlight time of 30 seconds while viewing the video, if you take no action within 30 seconds will be called pause the player and smartphone to sleep mode.
2. "Music" - If a duration of audio-file more than an hour, you see only the minutes and seconds. For example, the duration of the track is 79 minutes and 20 seconds and shows only 19 min 20 sec.
Have You a similar problems on your devices?
You may have discovered flaws in other applications?