You can shuffle the tracks of a playlist, album, etc. in the StreamMagic app by following the steps below:
How-to guide
1. Select a playlist, album, etc. in your chosen streaming service and select 'Play All'
2. Select the Now Playing view at the bottom of the screen
3. Once in the Now Playing view, swipe left
4. Once in the Play Queue, select the highlighted shuffle icon in the bottom left-hand corner