about class visually-hidden, my current page icon in navigation disappear!

Site URL: https://2021.chiayi.film/program

I change my navigation title from text  to image, but in current page, my image just disappear, how can i let it visible? 

It looks fine here. Do you still need help?

55 minutes ago, tuanphan said:

It looks fine here. Do you still need help?

second image " programme " in navigation is disappear , it should be visible

Some CSS overrided your code. Edit /program code to this

.header-announcement-bar-wrapper [href="/program"] {
    background-image: url(https://static1.squarespace.com/static/600e2084276d9d4dbba4af54/t/601924d2e1cd416030f233aa/1612260562922/nav-03.png) !important;
    content: "";
    background-size: contain !important;
    background-repeat: no-repeat !important;
    background-position: center center !important;
    width: 90px;
    height: 36px;
    display: block;
    visibility: visible !important;
    color: transparent !important;
}

(I added !important to increase priority)