Custom ComboBox : ListView doesn't display text when ElideRight

[lucast]

Hello, I'm writing a customization of QtQuick Controls ComboBox for my style, and I 've got an issue that I doesn't understand.

Here is a first simplified code of a customization that works

(It's a pastebin link, else askimet consider it's a spam)
MyStyle/ComboBox.qml

This result in this ComboBox

So I would like to ElideRight the text in the Popup's ListView's delegate

delegate: ItemDelegate {
        id: delegate
        required property var model
        required property int index

        width: control.width
        height: Math.max(control.implicitHeight, implicitContentHeight)

        highlighted: control.highlightedIndex === index
        hoverEnabled: control.hoverEnabled

        contentItem: Text {
            text: delegate.model[control.textRole]
            anchors.verticalCenter: parent.verticalCenter
            width: delegate.width
            color: control.textAndBorderColor
            font: control.currentIndex === index ? Theme.fonts.title : Theme.fonts.textBig
            elide: Text.ElideRight                                   //I just add this line
            horizontalAlignment: Text.AlignLeft
            verticalAlignment: Text.AlignVCenter
        }

        background: Rectangle{color: "transparent"}
    }

And this make the ListView unable to display the text

The strange thing is that it's like if the text is behind another element, because when I select a line, the previous and new text lines quick appears during the time the popup exit (here is with a 5s exit animation)

I don't understand why the elide mode change this. the Text width is specified, and if I set another elide mode (ElideNone/ElideLeft/ElideMiddle), it works.
I've tested this aside in another Popup on my app (not related to T.ComboBox) and it worked well, it seems that the issue is specific to the ComboBox's popup property