First, the quibble; the database is less than ideal for Classical music. The galling problem is that the app disconnects from the HAP Z1ES if left inactive for even a few minutes. That necessitates restarting the app, and, occasionally, resyncing the DB. I went so far as to get an Android tablet that's running nothing else, but no joy. The music transfer function will not run in the background. Ever. It is impossible for me to stand by for from 5 to 30 mins. while the transfer is effected.
A Google user
April 5, 2019