Pagedown Editor Nested Image Editor

I created my own hookImageDialog to upload files directly in the editor.

            $('div#insertImageDialog input[type=file]').ajaxfileupload({
                action: $file.attr('data-action'),
                onStart: function() {
                    $loader.show();
                },
                onComplete: function(response) {
                    $loader.hide();
                    if (response.success) {
                        callback(response.imagePath); // <---- oO
                        dialogClose();
                    } else {
                        alert(response.message);
                        $file.val('');
                    }
                }
            });

This works great the first time you insert an image.

Each time after that, it fails with the following exception:

Uncaught TypeError: Unable to call the 'removeChild' method from null Markdown.Editor.js: 1683 commandProto.doLinkOrImage.linkEnteredCallback Markdown.Editor.js: 1683 self.initMarkdownEditor.editor.hooks.set. $. ajaxfileupload.onComplete

The download is doing fine outside of the editor, so I can only think that this is some kind of callback problem.

They pulled my hair for most of the day.