iOS apps lost qobuz support!?

Hello,

I am using BubbleUPnP server on my synology NAS to use streaming from qobuz to my naim uniti. As control apps I have Lumin (iOS), Linn Kazoo (iOS) and BubbleUPnP (Android). This did work fine the last months. 

But since yesterday the two iOS apps do not offer qobuz playback anymore. What could be the reason? Maybe the new iOS version makes problems? Both apps do find my openhome-uniti device. But they are missing the qobuz menu items to switch to qobuz. BubbleUPnP still does work.

Does anybody has the same problem or even better an idea for a solution? I already tried to restart the NAS as well es the uniti, but this did not help.

Thanks

Gert