Need help with HTML/CSS

I’ve being working on my portfolio. I have set each page to min height of min-height:100vh, I see a bug when i resize the height of my window some content will overflow to the next page rather then push the container. I am wonder what condition makes content overflow and what condition makes it push its current div/container to extend instead?

URL: https://peterwebdev.com/

It looks like its working perfect for me.