[Reg 5.14.0 -> 5.14.1] WebAssembly: module "QtQuick.Controls" is not installed, Exit code -1

I try to build and run an application with the following qml code with Qt for WebAssembly

import QtQuick 2.14
import QtQuick.Window 2.14
import QtQuick.Controls 2.13

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Button {
        id: button
        x: 135
        y: 150
        text: qsTr("Button")
    }
}

While everything works well with Qt 5.14.0, when using Qt 5.14.1, I get the following error at startup in the web console

qmlRegisterType requires absolute URLs. 55 qtloader.js:382:25
QQmlApplicationEngine failed to load component qtloader.js:382:25
qrc:/main.qml:11:5: Button is not a type qtloader.js:382:25

Somehow it seems that the QtQuick.Controls plugin does not get linked into the .wasm binary. The 5.14.0 .was file is ~23MB big, while the 5.14.1 version is opnlue ~19MB big.

I am on Windows, using sdk-fastcomp-1.38.27-64bit