Perspective, Issues with WebSockets when embedding page as iFrame

I have created the following simple website, to take server and web application y.y.y.y (digital signage solution) out of the equation.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Embedded Ignition Perspective Dashboard</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: #f0f0f0;
        }
        iframe {
            border: 1px solid #ccc;
            width: 80%;
            height: 80%;
        }
    </style>
</head>
<body>
    <iframe src="https://x.x.x.x/data/perspective/client/ProjectA/" title="Ignition Perspective Dashboard"></iframe>
</body>

</html>

This reproduces the same issue, while instead just using a browser on my own laptop (whilst also on the same company network) from source ip address z.z.z.z which is serving simple pageindex.html through opera browser in my screenshot

PerspectiveClient.60c16865dfd7f31a5209.js:2 WebSocket connection to 'wss://usea1svigngtw01.moog.com/system/pws/CleanRoom/3c63c14?token=ryxQxmDCh9Sw8Ar6XpUC-5NknsBiOlwp3vYUFhxEZ3A' failed: 
connect @ PerspectiveClient.60c16865dfd7f31a5209.js:2
onStateChange @ PerspectiveClient.60c16865dfd7f31a5209.js:2
ye @ mobx-5.15.7.js:15
r @ mobx-5.15.7.js:15
y @ mobx-5.15.7.js:15
(anonymous) @ mobx-5.15.7.js:15
t.runReaction @ mobx-5.15.7.js:15
qe @ mobx-5.15.7.js:15
Ue @ mobx-5.15.7.js:15
Ge @ mobx-5.15.7.js:15
ke @ mobx-5.15.7.js:15
ge @ mobx-5.15.7.js:15
ye @ mobx-5.15.7.js:15
r @ mobx-5.15.7.js:15
onHelloFulfilled @ PerspectiveClient.60c16865dfd7f31a5209.js:2
PerspectiveClient.60c16865dfd7f31a5209.js:2 store.Channel: Websocket connection closed. code=1006, wasClean=false, reason=No reason given, codeMeaning=Code not defined, codeDescription=Code out of range.