I had the same problem. The new application has been working with my 210 and 251, but unfortunately did not see 818v3 with ID41. I have many zones at home and the situation was very interesting because the app worked with my sons iPhone and unfortunately not with mine. The only difference in the iOS settings was the iPhone language. If you set the language to English, the application works properly ... and you will see ID41 ...

1) 818v3, DSP8000SE, ATV4k, QNAP TVS-1282, Roon
2) 500, 518, 566, 404, 502, 2x 557, MS600, UHD722, ATV4k, JBL L100 Classic
3) MS200, AC12, DSP33
4) 210, DSP3200
5) 251, Bose Freespace 51
6) G95, Mission 76x series
7) G68, MS600, M3100, SW1600
8) MS200, AC12, DSP3100