Ligatures not working in one of the sites.

Site URL: https://www.herzbergdesign.com/bonkus-tester

I'm working in two websites and trying to implement ligatures via the font-variant-ligatures properties in CSS, I'm practically using the same code in both of them, but it doesn't work in one of them.

It works here:

https://sardiez.com/bonkus-tester

But it doesn't work here (password: bonkus1234 ) :

https://www.herzbergdesign.com/bonkus-tester

Just press the "ligatures" button to see if they work, I'm experiencing this problem only in Chrome.

<input id="toggle-liga" class="toggle-liga" type="checkbox">
<label for="toggle-liga" class="ot-btn">Ligatures</label>

.tester-container .toggle-liga:checked ~ .font-tester{
    font-variant-ligatures: common-ligatures discretionary-ligatures contextual;
}

Thanks in advance.