QtTreePropertyBrowser Not Obeying Stylesheet

In my application I'm using a QTreeView to display some data and a QtTreePropertyBrowser to display properties associated with that data (similar to Qt Designer's Object Inspector and Property Editor). I'm applying a custom QSS to the application using QMainWindow::setStyleSheet(). The relevant part of the stylesheet is:

Code:

---

QTreeView, QTableView {
	show-decoration-selected: 1;
	selection-color: white;
	alternate-background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #EFEFEF, stop: 1 #DFDFDF);
}
 
QTreeView::item {
	border: transparent;
}
 
QTreeView::item:!selected:hover {
	background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #D0D0D0, stop: 1 #CFCFCF);
}
 
QTreeView::item:selected:!hover{
	background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #8F9CBF, stop: 1 #838FAF);
}
 
QTreeView::item:selected:hover{
	background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #7888AF, stop: 1 #6D7C9F);
}

---

The QTreeView is affected by the stylesheet, but the QtTreePropertyBrowser's treeview is not. Is there an obvious reason for this? I'm assuming that the QtTreePropertyBrowser uses an underlying QTreeView to display its data.