[Interest] QML Text.contentWidth is never increasing

[Jason H]

http://doc.qt.io/qt-5/qml-qtquick-text.html#contentWidth-prop
"Returns the width of the text, including width past the width which is covered due to insufficient wrapping if WrapMode is set."

However if it ever enters into a wrapping situtation, it becomes the wrapped width:
|A B C| (decreasing width)

|A B|
|C  |

|A|
|B|
|C|

Once at that level, if space is then supplied it stays:
|A  |
|B  |
|C  |

Rather than 
|A B|
|C  |

|A B C|


Is there a way to work around this?
I often use it like:
Text {
	id: instructionText
	color: "white"
	text: instructionTextData
	width: contentWidth > parent.width *.9 ? parent.width *.9 : contentWidth
	font.pointSize: 16
	horizontalAlignment: Text.AlignHCenter
	anchors.horizontalCenter: parent.horizontalCenter
}

Where I want the text to be it's natural width up to 90% of the parent width, then wrap, but it only works when initially laying out and shrinking.