wasm: events from native virtual keyboards not sent to Qt Quick windows

Any key events synthesized in QWasmInputContext::inputStringChanged() are not recognized/received by input controls in Qt Quick windows. The code path to the mentioned method works properly, i.e. Android's native VK opens and key presses are received through the hidden input. However I'm unable to get even the simplest ApplicationWindow with a TextField control work:

import QtQuick.Controls

ApplicationWindow {
	width: 1280
	height: 800
	visible: true
	TextField { }
}