This is due to the way your tablet handles multitasking. When you do shuffle all or play a playlist that hasn't been saved, the web app pings the dune every second to check the play status and position. This is done to detect the end of a song in order to start the next (or a random one when shuffling).
When the browser is not the application running on the forefront it cannot do this check and therefore loses track and stops.
The solution is to save the playlist before playing it. However playlists saved via the webapp are limited to 300 songs as it will take too long to save. You could possibly create a playlist within DMM (pc application) containing all the songs and play that in shuffle mode from within the webapp.
To keep you informed, I'm working on the new version of PC/Webapp of DMM.
On the WebApp side the new features will be (limited) :
- multilanguage (english, french, portuguese)
- possibility to adjust the size of various elements (lists, covers, buttons, header/footer) to cope with the variety of display resolution, e.g. tablets
- Vol - / Vol + buttons
- Possibility to add songs to a playlist without having that playlist being played
If you have other ideas, let me know