display error Internet Explorer 11 & Betheme

If I use the Cookiebot plugin (with BeTheme) I have display error (narrow display, like a mobile site). Resize the browser window (IE) is the solution in some cases. If I deactivate the plugin all works fine. Tested with WP version 5.4, 5.3
BeTheme is up to date, plugin is up to date.

The page I need help with: [log in to see the link]