I cannot say I have experienced my music playing intermittently but this is probably because I am forced to use web gizmo most of the time.
The connection issue is real and very frustrating because there is quite a simple fix. Unfortunately it is considered low priority
My web connection is as good as it gets, lots of bandwidth and low latency, I also have a fixed public IP address and static internal addresses and it still fails. I will say that if it connects it normally works OK. Just like you, it frequently fails just as you are showing it off to friends.
Greetings:
I am also experiencing Gizmo connectivity issues, similar to the issues already stated.
I have both private and public IPs.
In my situation, I have tested my network setup with Directv Geniego- out of home, and tight vnc out of home connections. They both work when I am not at home. But with Gizmo it is a trial and error. It fails when you do not want it to fail. A couple of days ago, I disabled my Samsung Galaxy Note Wifi, enabled 4G LTE and attempted to connect. It just failed. I have luck connectingwith the Geniego and tight vnc apps.
Then I just decided to shut down the PC and powered it on again. I then connected successfully with Gizmo, 4G LTE was still on the handset.
This leads me to believe Gizmo might have issues connecting if the PC goes to sleep, or this might have something to do with PC idling, or the state of WOL on the PC. This is just my guess or suspicion.
George