ItemDelegate "padding" property doesn't set top/bottom padding any more

Following code:

ItemDelegate {
  height: 100
  width: 200
  padding: 0
    contentItem: Rectangle { color: "blue" }
}

 With Qt 5.9 this would paint the contentItem Rectangle the same size as the ItemDelegate itself. However, with Qt 5.11.0 (didn't test 5.10) this would add top and bottom padding to the contentItem. In order to achieve the same result as before, one now has to set:

padding: 0
topPadding: 0
bottomPadding: 0

This seems like wrong behavior and a regression to me.