Listening sometimes does not work

[jcelerier]

When loading this score:
https://gist.github.com/bltzr/ce30146e79bd59663066b57df7df5490

Recording does not seem to work (it uses listening).
But when debugging it can be seen easily when trying to change the value on the device explorer.
I checked and :

void JamomaAddress::observeValue(bool enable)
{
  TTAttributePtr attribute;
  mObject.instance()->findAttribute("value", &attribute);

  if (enable)
  {
    attribute->registerObserverForNotifications(mObjectValueCallback);
    //////// ** the code passes here ** ////////
  }
  else
  {
    attribute->unregisterObserverForNotifications(mObjectValueCallback);
  }

  // for Mirror object : enable listening
  if (mObject.name() == kTTSym_Mirror)
  {
    TTMirrorPtr(mObject.instance())->enableListening(*attribute, enable);
    //////// ** the code passes here ** ////////
  }
}

but when I do address->pushValue(...) the callbacks are not called, even if :

bool JamomaAddress::pushValue(const TTValue& value) const
{
  TTErr err;

  if (mObject.name() == "Data")
    err = mObject.send("Command", value);
  else
    err = mObject.set("value", value);      //////// ** the code passes here ** ////////

  return !err;
}

[jcelerier]

I tried changing the protocol to OSC (in the save file, change line 28666 to

"Protocol": "9a42de4b-f6eb-4bca-9564-01b975f601b9"

)
and in this case it works so maybe when the minuit device is not actually connected it is useless to try to send messages to it ?