Qt BluetoothService discovery

While implementing Qt bluetooth service discovery , I could not get signals and slots from found services when I was executing service discovery in separate class derived from QThread.

Service discovery never finished (discoveryFinished not received) , all the signal slots connections were done successfully before discovery was started

Only way I got this working was to use thread of QCoreApplication::instance()->thread();

Is this a feature or a bug or what is the reason that event loop in separate thread does not work with this