JavaScript dynamic form submit does not work in IOS 14

We are dynamically creating a form with input fields and relying on a function to submit the form and load the URL in the pop-up. This approach has been working fine and seems to have been broken in iOS 14. Prior to iOS 14 the code below resulted in a function getting called but it doesn't get called in iOS 14.

Code Block 
function RequestComment(querystring) {
        Popup(requestCommentPopup, '/test/index.aspx', 'rdata', querystring, 'toolbar=no,directories=no,status=no,location=no,scrollbars=yes,menubar=no,width=885,height=780,resizable=yes');
    }
    function Popup(popupWindow, url, windowName, querystring, params) {
        var newform;
        var qsElement;
        if (!document.getElementById('QSActionForm')) {
            newform = document.createElement('form');
            newform.id = 'QSActionForm';
            newform.name = 'QSActionForm';
            newform.method = 'post';
            document.body.appendChild(newform);
        }
        else {
            newform = document.getElementById('QSActionForm');
        }
        if (!document.getElementById('QS')) {
            qsElement = document.createElement('input');
            qsElement.id = 'QS';
            qsElement.type = 'hidden';
            qsElement.name = 'QS';
            newform.appendChild(qsElement);
        }
        else {
            qsElement = document.getElementById('QS');
        }
        if (popupWindow && !popupWindow.closed) {
            popupWindow.focus();
        }
        else {
            popupWindow = top.window.open('', windowName, params, false, false, false);
            newform.target = popupWindow.name;
            newform.action = url;
            qsElement.value = querystring;
            newform.submit();
        }
        void (window);
    }