back button code

Hello, can someone please help me. I’m trying to make the back button go back to where the user was previously scrolling. The back button currently takes them back to the directory page, but not the part they were scrolling.

This is my website, the page is a dynamic page : www. isu-directory. com/isu-directory/bde-illustration

Searching for something like this?
https://russian-dima.wixsite.com/meinewebsite/reading-position

I can’t find what i’m looking for, but reading position sounds like the right thing