Ok, it was an edit to my CSS that I guess caused the problem. Not sure how one would affect the other, but here’s the section of my CSS which, when removed, fixes the issue. I was trying to make the header a little dimmer.
header::before {
content: "";
position: absolute;
top: 0px;
right: 0px;
bottom: 0px;
left: 0px;
background-color: rgba(0,0,0,0.2);
}