Repost, Sorry: Sticky Container doesn´t want to stick on mobile screens

Hey there,

got some issues with sticky container on mobile screens. Everythings works well on desktop and tablet but on smaller screens nothing except one sticky want to work.
The weird thing is: Yesterday before I started editing smaller screens sizes it worked.
I´m using Brave browser, but on iPhone it doesn´t work, too.
There are threads with similar issues, but none could solve my one. Any ideas?

Sorry for deleting the other thread, something didn´t work. I´m not quite familiar yet with everything here.
Thanks in advance.

Here is my site Read-Only: [LINK][1]
([how to share your site Read-Only link][2])

Fixed it. Something was overflowing and kept the container from sticky.