An update has just arrived for IPad / IPhone. version 5.7.8
well update all the applications directly on your Rose device and it works perfectly 
This has fixed at least one long standing bug - tracks on multi-disk albums are now played in the right order.
I spoke too soon. Most, but not all, 2 disk sets are handled correctly, but 3 and more disk sets still play track 1 from each disk then track 2 etc.
The albums which still list tracks out of order do so using the touch screen as well as the app so there’s some bug in the firmware.
Oh, and the app freezes fairly regularly.