qt - QML Viewtransition changes unchanged paramter? -

i trying create smoothly changing list in qml, animations have unexpected side effect. toy code moves around items every time window resized:

import qtquick 2.5 import qtquick.window 2.2  window {     visible: true      listview {         id: listview1         x: 0         y: 0         width: parent.width         height: parent.height         onwidthchanged: {             model.move(0,1,2);         }          move: transition {                smoothedanimation {                    properties: "x,y"                    duration: 1000                }         }         displaced: transition {                 smoothedanimation {                     properties: "x,y"                     duration: 1000                 }         }          delegate: item {             x: 5             onxchanged: {                 console.log("x: ", x)             }              width: parent.width             height: 40             text {                     text: name                     anchors.verticalcenter: parent.verticalcenter                     font.bold: true             }         }         model: listmodel {             listelement {                 name: "grey"             }             listelement {                 name: "red"             }             listelement {                 name: "blue"             }         }     } } 

oddly enough, output when play around window:

qml debugging enabled. use in safe environment. qml: x:  0.7840000000000007 qml: x:  0 qml: x:  1.2960000000000003 qml: x:  0 qml: x:  1.2960000000000003 qml: x:  0 

and not temporary, items change x position permanently. fault?