Problem with Divi on my Website

Hey guys,
I have a small problem on one of my websites. I have there a "box" in Divi and if its in Desktop mode everything is fine.
As soon as I go into mobile mode the "box" is completely false formatted. Everything else on the side works. Its just this one box.

Everything is fine here.

Thats the mobile view. Looks awful right.
Sorry for censoring but paranoia is always there on bhw

Thanks for helping in advance.

Edit:

Here are some of my settings

I can't understand the language in your settings hehe. Anyway, I guess that's the settings of the section of that area. What's the module used to style the background of the blue "box"? Isn't it a column?
And the form, is it plugin generated, like CF7?