QBluetoothDeviceDiscoveryAgent::deviceUpdated not emitted on RSSI change

When doing a BTLE scan under Linux the QBluetoothDeviceDiscoveryAgent::deviceUpdated signal is never emitted, although bluez reports lots of RSSI changes (which is observed using dbus-monitor).

When enabling the qt.bluetooth.bluez logging, the string "Updating RSSI for" is also never printed, which corresponds with the fact that QBluetoothDeviceDiscoveryAgent::deviceUpdated is never emitted.

Also any changed manufacturer data is not reflected in the discoveredDevices list, leading me to suspect that the _q_PropertiesChanged function is never called or at least in such a way that the device is not found in the discoveredDevices list.