Hey, I love the app! However…
I’m a previous DSub user, and that app had quite a few problems with UPnP playback. Symfonium is a lot better is this regard, however, I’m having a few similar, intermittent issues.
First, sometimes playback pauses between songs. Playback may resume by itself after a period of time (10-60 seconds) but it seems like if I push the phone power button (thus activating the screen), playback continues immediately.
Second, and this is an infrequent issue which I had all the time with DSub; it seems like the connection to the UPnP speaker is sometimes lost. The speaker may keep playing the current song, but the app volume controls doesn’t work and the UI doesn’t show playback status. I can’t rule out network issues entirely.
I realize these issues can be hard to debug, but I’ll help any way I can (I’m a Java developer, so I have some relevant knowledge).