Hi

I have an OpenOb streaming link that occasionally goes silent, no audio heard from the receiver.
I can log into both RasPi's and the OpenOb application is running on both computers (PID present).
If I stop the sender and on the command line, re-direct it to my test receiver (on the same VPN), I hear audio, I then re-connected the sender to it's receiver and audio is then heard (until the next dropout).
The setup is using Rasp4, with buster OS, The  send end is using AudioInjector stereo.
The receiver audio card is an IQaudIO DAC HiFi pcm512x-hifi-0.
The link is running 24/7, over a VPN network between the sender and receiver (latency between 20-30ms)
Any suggestion to locate the problem would be appreciated.

Tks Evan