Android A11Y TalkBack: onPressAction get's not called

Context

Items on Android Phone with TalkBack activated should be shown as dedicated elements a blind person can navigate through. It has to fulfill requirements of WCAG 2.0 / WCAG2ICT

Expectations

• onPressAction should be called for "clicks" via Android Accessibility features (like TalkBack).
• onClick should not be called if Accessibility features are on.

Observation

On Android 5 devices, "onClick" is called and "onPressAction" does nothing. Button 1 has no output, Button 2 writes "BAR".

 Code

import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.15

Window {
    visible: true

    Column {
        Button {
            text: "Button 1"
            Accessible.onPressAction: () => console.log("FOO")
        }
        Button {
            text: "Button 2"
            onClicked: () => console.log("BAR")
        }
    }
}

Note

Android 5 is still relevant for us, because it is officially supported by Qt 5.15. It is also used as device in the Accessibility Audit (https://doc.qt.io/qt-5/android.html)