The same thing happens with Bubbleupnp. I think this is a problem with the Zen Stream rather than the DLNA app. Switching to DLNA mode seems to knock the Zen Stream off the wifi, as both Mconnect and bubbleupnp give me some form of the message "destination/file path not found" when I try to play a track after changing to DLNA mode (and restarting, of course). Actually, when I first switch over to DLNA mode, Mconnect lists two ifi signals, "ifi stream," and just "ifi" (In AIO/set-up mode, only "ifi" appears on the ist of upper devices). So I wonder if the problem has something to do with the "ifi stream" signal?
Wondering if anyone else is using DLNA mode? Do you notice a difference between set-up mode and DLNA mode? Maybe the differences between modes is negligible and I shouldn't worry about it.