Problems with punycode and ultimate shortcodes plugin for WordPress, how to fix?

Question

WordPress

In general, there is a site with a .rf domain - everything works well, except for the ShortCodes-Ultimate plugin - I think many people use it.
here's what the site starts to read: е-ÑаймÑ.ÑÑ - it's like the website address is

loading the CSS "changed from somewhere" when working or changing it itself at the time of loading - I look at it in the editor:
.su-slider {
transition -duration: 0.9s;
}
and so on.
and when uploading to the site, the same file changes with the following data:
.su-slider {
transition-duration: 0s;
}
and also began to crop photos crookedly and recreate them again with the sizes that were indicated when inserting this shortcode, let's say I set 1000x700 pixels, and it cuts, creates a file, although there is a daw that the slider will be responsive.
on the second site with a normal domain in the info zone - everything works as it did ....
where to dig?
found here an answer something like this:
if ($_SERVER['HTTP_HOST'] == 'PUNYCODE') {
define('WP_HOME',' xn----8sbnsp4ad.xn--p1ai ');
define('WP_SITEURL', 'xn----8sbnsp4ad.xn--p1ai');
}
but to no avail