QMetaObject::invokeMethod returns true but doesn't execute the solt

Question

I'm trying to run a public slot in another thread using invokeMethod:

QMetaObject::invokeMethod(m_manager, "onEventRequest", Qt::QueuedConnection, Q_ARG(int, 0));

Now, invokeMethod returns true and no error message are reported, but the slot onEventRequest is never called. I added a breakpoint in onEventRequest which is never triggered.

m_manager is created in the main thread, this class inherits QObject and uses the Q_OBJECT macro invokeMethod is executed in another thread created by QThread::run().

I would appreciate any help on this, or on how to check why the method is not being called.