[Reg 6.5 -> 6.8] Qt 6.8 silently removed sharing of global variables between 2 typescript/javascript files

import QtQuick
// import "b1.mjs" as B1 // Uncommenting this line, triggers bug

Window {
    id: mainWindow
    objectName: "mainWindow"
    width: 500
    height: 500
    visible: true

    Loader {
        id: contentLoader
        anchors.fill: parent
        source: "loaded.qml"
    }
}

import QtQuick
import "./a1.mjs" as A1
import "./b1.mjs" as B1

Item {
    id: root

    Component.onCompleted: {
        A1.process_a1()
        B1.read_from_b1()
    }
}

import {read_from_b1} from "./b1.mjs";

export let data_a1: any

export function process_a1() {
    data_a1 = "DATA_IN_A1"
    console.error("In a1 -", data_a1)
    read_from_b1()
}

import {data_a1} from "./a1.mjs";

export function read_from_b1() {
    console.error("In B1", data_a1)
}

In a1 - DATA_IN_A1
In B1 DATA_IN_A1
In B1 DATA_IN_A1

In a1 - DATA_IN_A1
In B1 undefined
In B1 undefined