two other users have reported the same problem, but I have not seen any proposed solution. I have checked most sources of error I think;
-WLAN or LAN connection or both doesn’t make a difference
-It works fine on another DAC I have and via HDMI, so it is the combination with TP30 that is the problem
-The Volumio can be selected via shareplay, and it seems that the RPI plays (WLAN adapter receiving data), but no sound output.
I liked the 1.4 generally, seemed more stable than an early beta I used before.
Combination: RPI, Topping TP30, Edimax