Problem with mobile menu

Hi, I have just contacted you caused to update from Catch Box Version 4.1 to the actual version (https://catchthemes.com/support-forum/topic/search-widget-2/). Now I found a design error in the actual version. If I use a tablet and I click on the menu link at the top of page, the menu opens, but there is a space on the right side of the menu (see what I mean: www.christus-gemeinde.net/test.png). This gray space between the menu and the content was not there before the update. It looks not good at the moment. How can the problem be fixed? I also checked it without my child theme with the same result. The adjustment of the content when I click on menu link seams to be wrong... I hope this can be fixed? Best regards