I prefer to hear music from NAS via the Android-app BubbleUPNP (without using TV !). Since version 2.1.22 (also new 2.1.28) my Zidoo X9S is not working anymore as a renderer to send the music to Zidoo's music-app an then to AV-receiver. In BubbleUPNP (and other apps) the X9S is shown as renderer but it doesn't play music. I went back to version 2.1.1, this works. Is it possible to implement this function in further firmware updates again?