Bootstrap modal: background jumps to top on toggle

Question

I have a problem, with a modal. I have a button on a page, that toggles the modal. When the modal shows up, the page jumps to top.

I have done everything I could to

Answer 1

Possibly working with modals nested somewhere in the code:

body.modal-open {
    overflow: visible;
    position: absolute;
    width: 100%;
    height:100%;
}

For me it was a combination of position, height and overflow.