Is UPnP a rubish protocol ???

[stefano_mbp]

I am quite convinced that Lumïn app is the problem.
I use it too and sometimes I need to swipe off the app and relaunch it.
But apps like Kazoo, Linn and MConnect player doesn’t have this “issue” but Lumïn is way better therefore I’m still using it … cannot say anything about Android apps a I’m on iPhone and iPad.
Do you need to use Bubbleupnpserver with Lumïn app (I do)?