Can not input value on form Mathtype when open editor on modal popup

I see solution on tinymce issue: https://github.com/tinymce/tinymce/issues/6386
https://www.tiny.cloud/docs/integrations/bootstrap/#usingtinymceinaboots...

And i apply to my project:

$(document).on('focusin', function(e) {
        if ($(e.target).hasClass('wrs_focusElement')) {
          e.stopImmediatePropagation();
        }
      });

Is there a way in JS to detect if the ckeditor form lives in a modal itself? If so we could add your code to the JS of the module. (I'm no JS expert so I don't know).