QTreeView::branch gridline-color?

[chouqud]

I'm trying to set the grid-line color of a QTreeView branch via the stylesheet.

QTreeView::branch:hover {
    gridline-color: rgba(255, 255, 255, 255);
    background-color: rgba(255, 0, 0, 128);
}

QTreeView::branch:hover {
    gridline-color: rgba(255, 255, 255, 255);
    background-color: rgba(255, 0, 0, 128);
}

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What I expect is a white dotted line with red background but while the background changes correctly, it looks like the grid-lines are simply failing to render.

Removing the style restores the grid-lines to the default style. What am I doing wrong?

_chouqud_