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

I tried to set .modal top at the center of the screen.

.modal {
    position: absolute;
    top: 50%;
}

Just my 2cents of thoughts.