QML SystemTrayIcon silently fails if it is unable to find the icon source

Code

import QtQuick 2.15
import QtQuick.Window 2.15
import Qt.labs.platform 1.1

Window {
    width: 640
    height: 480
    visible: true

    SystemTrayIcon {
        visible: true
        icon.source: "non-existent-icon.png"
    }
}

Actual outcomes

• Nothing appears in the system tray, AND
• No errors/warning messages are produced

Expected outcomes

• A blank icon appears in the system tray, OR
• An error/warning message is produced to point out the missing file