I got the same problem, still looking for solution too
You need to use the bluetooth connection for this, if I recall correctly. Wifi connection doesnt really do it anymore.
I did use the bluetooth mode of the Handy but it did not work
I had this problem and had trouble undersanting how to solve it.
The wifi connection no longer works, so bluetooth is the solution, but for this to works the device must be in index 0 on intiface, the first device in the list.
OSR6 can play it ？