I'm writing a JavaScript University building indoor map program, and the displaying route code works, however my dictionary which stores the graph is being changed within the function and I don't have much experience in JavaScript and can't spot the problem.

this is the Dictionary;

const TheGraph = {
    "A" : { 
        "Coordinates" : [3776, 625],
        "Links" : {"C": 1}
    },
    "B" : { 
        "Coordinates" : [970, 910],
        "Links" : {"C" : 5, "G" : 5}
    },
    ....

}

And this is where i believe is the problem

button.addEventListener('click', () =>{
        var possRoutes = []; // stores the points
        const lineString = new H.geo.LineString();
        var heading = (document.getElementById('room-header')).innerHTML 
        var heading = heading.substring(5); // gets the name of the room
        for (const x of (Rooms[heading][1])){
            possRoutes.push(findShortestPath(TheGraph, "A", x))
        } // finds the shorted path
        possRoutes.reduce(function(prev, curr) {
            return prev.distance < curr.distance ? prev : curr;
        });
        for (var cor in possRoutes[0].path){
            var point = TheGraph[point = possRoutes[0].path[cor]].Coordinates // gets the coordinate from the dictionary
            var distanceToOrigin = pythagorean(point[1], point[0])//maths
            var ang = 1.5708-(angle + Math.atan(point[0]/point[1]))
            point[0] = originX-(Math.cos(ang)*distanceToOrigin)*scaleX
            point[1] = originY-(Math.sin(ang)*distanceToOrigin)*scaleY
            lineString.pushPoint({lat: point[0], lng: point[1]}) // adds the point to the map
        }
        point = Rooms[heading][0]
        var distanceToOrigin = pythagorean(point[1], point[0])
        var ang = 1.5708-(angle + Math.atan(point[0]/point[1]))
        point[0] = originX-(Math.cos(ang)*distanceToOrigin)*scaleX
        point[1] = originY-(Math.sin(ang)*distanceToOrigin)*scaleY
        lineString.pushPoint({lat: point[0], lng: point[1]})
        console.log(TheGraph)
        path = new H.map.Polyline(
            lineString, { style: { lineWidth: 4,
                strokeColor: '#2600ff' }}
        )
        F0.addObject(path);//displays the route on the map
    })