Hmmm, this should not be happening. Unless there is a sink change which Pulse is then not notifiying its respective clients of the change.
When this is occurs can you confirm that within G-V-C the correct sink is selected as the default output (G-V-C can be opened via 'Sound preferences' on the sound menu). I suspect the sink is changing but the signal to inform that the sink has changed is not being sent.
Hmmm, this should not be happening. Unless there is a sink change which Pulse is then not notifiying its respective clients of the change.
When this is occurs can you confirm that within G-V-C the correct sink is selected as the default output (G-V-C can be opened via 'Sound preferences' on the sound menu). I suspect the sink is changing but the signal to inform that the sink has changed is not being sent.
Conor