It’s weird for me because we don’t have those kind of problem on our side. It seems you will need to reinstall the theme and required plugin. Maybe there are some conflict between our theme and not related plugin in there. Please still only using required plugins that come with JKreativ for a while.
If the problem still occurs, please provide me login info via ftp of your site. I will check it further. You can send it here or directly via email here [email protected]