Undefined request (404 error) on Divi when using WebP <picture> tag method

Describe the bug
When using Divi theme and activate WebP display using tag method, there is failed request in console (https://example.com/undefined), also visible in GTMetrix like this:

And in console it looks like this:

The problem is related to Divi's custom.unified.js file, line 80. When unminified, this function looks like this:

t("#logo").length &&
                            ((q = t("#logo").attr("src")),
                            (Q = function () {
                                var e,
                                    n,
                                    r,
                                    i = t("#logo"),
                                    o = "svg" === i.attr("src").substr(-3, 3);
                                t("body").append(t("<div />", { id: "et-define-logo-wrap", style: "position: fixed; bottom: 0; opacity: 0;" })),
                                    (e = t("#et-define-logo-wrap")),
                                    o && e.addClass("svg-logo"),
                                    e.html(i.clone().css({ display: "block" }).removeAttr("id")),
                                    (n = e.find("img").width()),
                                    (r = e.find("img").height()),
                                    i.attr({ "data-actual-width": n, "data-actual-height": r }),
                                    e.remove(),
                                    A(!0);
                            }),
                            (($ = new Image()).onLoad = Q),
                            ($.onload = Q),
                            ($.src = q)),

And it looks like a problem in this part ($.src = q).

If this function is completely removed, the issue is gone. I guess Imagify fetch this dynamically when nothing is defined yet, so the error occurs.

Steps to reproduce the behavior:

1. Activate Divi theme (or make sure it is active)

2. Activate WebP display option ( tag method) in Imagify settings

3. Visit the site (front-end) and check Console output or test website in GTMetrix

Reproduce the front-end failure with Divi active and Imagify's WebP method enabled, then inspect Divi's custom.unified.js around line 80 and the related Imagify output. Done means the page no longer requests an undefined URL while retaining the WebP display behavior; the payload names no project test to run.