Setting Map.center from javascript

[Sriep]

I am having a problem setting Map.center from javascript Qt5.7. The code below is a variant on minimal_map for mapbox.
The console log gives.
qml: map.center.latitude -0
qml: map.center.longitude 1.34624
So the latitude value seems to get set to zero when setting coordinates. I have tried numerous approaches to trying to set map.ceter but cannot get any of them to work.

It might be related to the following bug report https://bugreports.qt.io/browse/QTBUG-55424

So what I want to know. If it's the same bug what is the work around? If it's not a bug what obvious thing am I overlooking?

Window {
width: 512
height: 512
visible: true

Plugin {
    id: mpaboxPlugin
    name: "mapbox"
     PluginParameter {
         name: "mapbox.access_token"
         value: myAccessToken
     }
     PluginParameter {
         name: "mapbox.map_id"
         value: "examples.map-zr0njcqy"
     }
}

Map {
    id: map
    anchors.fill: parent
    plugin: mpaboxPlugin
    center {
        latitude: 29
        longitude: 15
    }
    zoomLevel: 6
}

PositionSource {
    id: positionSource
    onPositionChanged: {
        //map.center = QtPositioning.coordinate(59.91, 10.75);
        map.center.latitude = 52.0;
        map.center.longitude = 1.346240;
        console.log("map.center.latitude", map.center.latitude);
        console.log("map.center.longitude", map.center.longitude);
    }

}

}

[skats]

I have exactly the same problem. Some help would be appreciated.