import QtQuick
import QtQuick.Controls
import QtQuick.Layouts

ApplicationWindow {
	id: appWindow

	visible: true

	background: Rectangle {
		color: "lightgreen"
	}

	ColumnLayout {
		anchors.fill: parent

		Button {
			Layout.alignment: Qt.AlignHCenter
			text: "test 1"
		}
		Button {
			Layout.alignment: Qt.AlignHCenter
			text: "test 2"
		}
	}
}

With Qt 6.5.3 everything was fine. , and show the behavior on a tablet and a phone with Android. When the application was started the first button is selected by TalkBack.

With Qt 6.7.2 something is wrong. As visible in the other screenshots there is an additional "main element" without any a11y description that is selected on application start. Using Accessible properties in ApplicationWindow does not help. On a tablet (Google Pixel) also the on screen keyboard becomes visible sometimes.

I am still working on tests with Qt versions between 6.5.3 and 6.7.2.

Edit: Qt 6.6.3 has the same correct behavior as Qt 6.5.3. It is wrong since 6.7.0.